{"title":"Recent Advances in Refractive Surgery: An Overview.","authors":"Bharat Gurnani, Kirandeep Kaur","doi":"10.2147/OPTH.S481421","DOIUrl":"10.2147/OPTH.S481421","url":null,"abstract":"<p><p>Refractive surgery has experienced substantial advancements over the past few years, driven by innovative techniques and continuous technological progress aimed at enhancing visual outcomes and patient satisfaction. Refractive errors such as myopia, hyperopia, and astigmatism affect a significant portion of the global population, impacting quality of life and productivity. Recent advancements have been fueled by a deeper understanding of ocular biomechanics and visual optics, leading to more precise and effective treatments. Traditional methods such as LASIK and PRK have been refined, and new procedures like SMILE (Small Incision Lenticule Extraction) have been introduced, expanding the range of treatable refractive errors and improving safety and predictability. Customized treatments, such as wavefront-guided LASIK and topography-guided PRK, allow for individualized plans tailored to each patient's unique corneal characteristics, enhancing visual acuity and reducing higher-order aberrations. The use of femtosecond lasers in procedures like Femto-LASIK and femtosecond laser-assisted cataract surgery (FLACS) offers unparalleled precision, reducing surgical risks and improving outcomes. Implantable Collamer Lenses (ICLs) and corneal crosslinking (CXL) have emerged as effective options for specific patient groups. Advanced diagnostic tools like optical coherence tomography (OCT) and Scheimpflug imaging have improved surgical planning and complication management. As research and technology continue to evolve, these advancements promise even greater improvements in refractive surgery, addressing the visual needs of the global population.</p>","PeriodicalId":93945,"journal":{"name":"Clinical ophthalmology (Auckland, N.Z.)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11380141/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142156854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J Morgan Micheletti, Kendrick M Wang, Khanh Ton, Karlie N Bonem
{"title":"Capsular Waves: A Warning Indicator for Potentially Malpositioned Intraocular Lenses.","authors":"J Morgan Micheletti, Kendrick M Wang, Khanh Ton, Karlie N Bonem","doi":"10.2147/OPTH.S474591","DOIUrl":"10.2147/OPTH.S474591","url":null,"abstract":"<p><strong>Purpose: </strong>To share examination findings of the lens capsule which may act as an indicator for malpositioned intraocular lenses (IOL).</p><p><strong>Setting: </strong>Single large multi-specialty private practice, Houston, Texas, USA.</p><p><strong>Design: </strong>Focused, observational case series.</p><p><strong>Methods: </strong>A review of pre-operative images of malpositioned single-piece IOLs with at least one haptic in the ciliary sulcus was conducted. The review included five cases who were referred to a single large multi-specialty private practice from June 2023 to December 2024 for an evaluation of posterior capsular opacification (PCO) and potential Nd:YAG capsulotomy.</p><p><strong>Findings: </strong>A total of five eyes which previously had undergone cataract surgery and were referred for Nd:YAG capsulotomy for PCO were identified on slit lamp examination to have capsular waves, defined as a centripetal and circumferential striated pattern of PCO that results from a fused anterior and posterior capsule with at least part of the IOL anterior to the capsule. While one eye exhibited transillumination defects and pigment dispersion, the remainder of eyes did not. In some cases, the capsular wave was the only clue to IOL malpositioning due to a small pupil. These eyes had single-piece IOLs with at least one haptic in the sulcus and required subsequent IOL repositioning or exchange.</p><p><strong>Conclusion: </strong>If capsular waves are seen on slit lamp exam, a thorough inspection of IOL placement should be conducted, especially before treatment with Nd:YAG capsulotomy. Capsular waves result from anterior and posterior capsule contact with an anteriorly situated IOL. This finding is a potential indicator of at least part of an IOL positioned anterior to the anterior capsule.</p>","PeriodicalId":93945,"journal":{"name":"Clinical ophthalmology (Auckland, N.Z.)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11379029/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142156950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Novel Technique Using Lyophilized Amniotic Membrane Patch (LAMPatch) as Primary Procedure in Patients with Myopic Traction Maculopathy with Macular Detachment.","authors":"Abel Ramirez-Estudillo, Sergio Rojas-Juarez, Ximena Ramirez-Galicia, Angel Garcia-Vasquez, Silvia Medina-Medina, Rosario Gulias-Cañizo","doi":"10.2147/OPTH.S469801","DOIUrl":"10.2147/OPTH.S469801","url":null,"abstract":"<p><strong>Introduction: </strong>Maculopathy secondary to pathologic myopia (PM) is increasingly causing visual impairment and blindness worldwide. PM is associated with tractional maculopathy that ranges from macular foveoschisis to macular hole. These disorders are treated with different options that offer variable results, reflecting the need for new techniques that address myopic maculopathy with consistent outcomes.</p><p><strong>Methods: </strong>Since human amniotic membrane (HAM) has been reported to be safe for intraocular use and to promote retinal healing, it was incorporated as an adjuvant in pars plana vitrectomy in patients with different tractional disorders related to myopia. This work presents a prospective, consecutive case series of seven patients with high myopia who underwent a 25-gauge vitrectomy with ILM peeling and HAM transplantation.</p><p><strong>Results and discussion: </strong>Our six-month results show that this novel technique delivers functional success related to tissue permanence without recurrence of traction that translates into visual acuity gain and maintenance that are superior to other techniques.</p>","PeriodicalId":93945,"journal":{"name":"Clinical ophthalmology (Auckland, N.Z.)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11378782/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142156949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Slanted and Standard Lateral Rectus Recession Procedures for Convergence Insufficiency-Type Intermittent Exotropia in Children: A Retrospective Cohort Study.","authors":"Yumi Suzuki, Takafumi Aoki, Akane Tomita, Tadahiro Mitsukawa, Yukiko Hama, Masakazu Yamada","doi":"10.2147/OPTH.S471172","DOIUrl":"10.2147/OPTH.S471172","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the efficacy and safety of slanted bilateral lateral rectus recession (BLR-rec) for treating convergence insufficiency-type intermittent exotropia (CI-IXT) in children.</p><p><strong>Methods: </strong>In this retrospective cohort study, 26 patients aged <16 years with CI-IXT who underwent BLR-rec between August 2016 and July 2021 with six months of follow-up data post-surgery were classified into slanted BLR-rec group (n = 14) and standard BLR-rec group (n = 12; equal-length recession of the upper and lower horns of the LR muscle). Surgical outcomes were compared between the groups.</p><p><strong>Results: </strong>In the slanted and standard groups, the preoperative distance exodeviation was 27.9 ± 5.5 and 30.8 ± 10.0 prism diopter (PD) (p = 0.63), near exodeviation was 41.1 ± 5.6 and 42.9 ± 9.2 PD (p = 0.75), and difference between near and distance deviation (N-D deviation difference) was 13.2 ± 3.2 and 12.1 ± 3.3 PD (p = 0.30), respectively. The ratio of postoperative and preoperative N-D deviation difference was compared between the slanted BLR and standard BLR groups at six months postoperatively. The results revealed that the ratio for slanted-BLR was 0.44 ± 0.19, and for standard-BLR was 0.84 ± 0.24. In the standard group, stereoacuity remained unchanged post-surgery compared to that pre-surgery, while the slanted group showed significant improvement (p < 0.05, Wilcoxon signed-rank test).</p><p><strong>Conclusion: </strong>Compared with the standard BLR-rec procedure, the slanted BLR-rec procedure reduced N-D deviation differences in CI-IXT, positively impacting gross stereopsis.</p>","PeriodicalId":93945,"journal":{"name":"Clinical ophthalmology (Auckland, N.Z.)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11370759/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142127658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Patricia Muñoz-Villegas, Gisela García-Sánchez, Ricardo O Jauregui-Franco, Sebastian Quirarte-Justo, Alejandra Sánchez-Ríos, Oscar Olvera-Montaño
{"title":"Influence of Environmental Factors with Clinical Signs and Symptoms in the Management of Dry Eye Disease.","authors":"Patricia Muñoz-Villegas, Gisela García-Sánchez, Ricardo O Jauregui-Franco, Sebastian Quirarte-Justo, Alejandra Sánchez-Ríos, Oscar Olvera-Montaño","doi":"10.2147/OPTH.S480223","DOIUrl":"10.2147/OPTH.S480223","url":null,"abstract":"<p><strong>Background: </strong>This research aims to investigate the influence of environmental factors on the treatment efficacy of ocular lubricants in patients from urban areas with dry eye disease (DED).</p><p><strong>Methods: </strong>A phase IV clinical trial, which included 173 patients from major cities in Mexico, was randomly assigned to use ocular lubricants four times a day for 30 days. Ocular Surface Disease Index (OSDI), noninvasive tear film break-up time (NIBUT), ocular staining, and conjunctival hyperemia (CH) among other factors like weather, and air pollution as covariates were analysed.</p><p><strong>Results: </strong>After 30 days, OSDI score decreased by 14.8 points (<i>p</i><0.001), and NIBUT increased by 2.9 seconds (<i>p</i>< 0.001), with longer values observed in patients recruited in autumn and winter (additional 1.8 seconds, <i>p</i>< 0.05) compared to those recruited in spring. Patients living in cities with cooler weather and high humidity, but low air quality had higher OSDI and conjunctival stain scores of up to 4.4 and 0.3 points, respectively, as compared to those living in cities with similar pollution and humidity levels but with higher temperatures (<i>p</i>-values= 0.019 and 0.050). Patients with moderate CH had an increase of up to 0.8 points in their corneal stain score (<i>p</i>< 0.010). We also found that ozone levels were related to the predicted changes in OSDI and NIBUT.</p><p><strong>Conclusion: </strong>This study demonstrated the impact of environmental factors on the signs and symptoms of DED and suggests that patients residing in cities with inadequately controlled air pollution can benefit from using ocular lubricants to alleviate their symptoms.</p><p><strong>Trial registration: </strong>Trial is registered at clinicaltrials.gov (NCT04702776).</p>","PeriodicalId":93945,"journal":{"name":"Clinical ophthalmology (Auckland, N.Z.)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11372294/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142134750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Environmental and Occupational Triggers of Dry Eye Symptoms in the Ahsa Region of Saudi Arabia: A Cross-Sectional Study.","authors":"Saif Khuzaim Al-Dossary","doi":"10.2147/OPTH.S474832","DOIUrl":"10.2147/OPTH.S474832","url":null,"abstract":"<p><strong>Objective: </strong>This cross-sectional study aimed to investigate the associations between environmental and occupational factors and the prevalence of dry eye symptoms among participants from the Ahsa region of Saudi Arabia.</p><p><strong>Methods: </strong>Participants from urban, rural, and suburban areas seeking medical care at primary health centers were recruited through systematic random sampling. Data on demographics, exposures, and ocular health were captured using a structured questionnaire. Dry eye symptoms were evaluated using the Ocular Surface Disease Index (OSDI), Impact of Dry Eye on Everyday Life (IDEEL), and Symptom Assessment in Dry Eye (SANDE) questionnaires. Logistic regression analysis examined the relationships between environmental/occupational factors and the prevalence of dry eye symptoms.</p><p><strong>Results: </strong>Key exposures included particulate matter (PM) (60%), low humidity (55%), wind/dust (50%), prolonged computer use (65%), and chemical irritants (45%). These factors were significantly associated with an increased prevalence of dry eye symptoms, with the following odds ratios (ORs): PM (1.85, 95% CI: 1.35-2.52), low humidity (1.45, 95% CI: 1.05-2.00), wind and dust (1.60, 95% CI: 1.20-2.14), prolonged computer use (2.10, 95% CI: 1.55-2.85), and chemical irritants (1.75, 95% CI: 1.30-2.35). All associations were statistically significant (p < 0.05). The use of protective equipment was associated with reduced odds of dry eye symptoms (OR 0.60, 95% CI: 0.42-0.85, p = 0.03).</p><p><strong>Conclusion: </strong>This study identifies significant associations between specific environmental and occupational exposures and the prevalence of dry eye symptoms. Reducing modifiable exposures through policy, workplace enhancements, and clinical preventative strategies is essential to mitigate the burden of dry eye symptoms related to modern lifestyles and technology.</p>","PeriodicalId":93945,"journal":{"name":"Clinical ophthalmology (Auckland, N.Z.)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11368111/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142121328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Benjamin D Sullivan, Marta Palazón de la Torre, Ines Yago, Raúl Duarte, Julie M Schallhorn, Lisa M Nijm, Darrell E White, Michael S Berg, Pablo Artal
{"title":"Tear Film Hyperosmolarity is Associated with Increased Variation of Light Scatter Following Cataract Surgery.","authors":"Benjamin D Sullivan, Marta Palazón de la Torre, Ines Yago, Raúl Duarte, Julie M Schallhorn, Lisa M Nijm, Darrell E White, Michael S Berg, Pablo Artal","doi":"10.2147/OPTH.S484840","DOIUrl":"10.2147/OPTH.S484840","url":null,"abstract":"<p><strong>Purpose: </strong>To study the association between tear film hyperosmolarity and ocular light scatter in a cataract surgery population.</p><p><strong>Patients and methods: </strong>Contiguous, 20-second objective scatter index (OSI) scans were recorded in hyperosmolar (≥320 mOsm/L) and normal subjects (<308 mOsm/L) with cataract nuclear opacity ≥3. OSI was measured at screening, baseline and 90 days following surgery. Along with symptoms of ocular surface disease, slit-lamp examination included corneal staining (0-3), tear film breakup time (TBUT) and evaluation of meibomian gland disease (MGD). An additional cohort of hyperosmolar subjects were measured for OSI at screening, baseline, and 5, 10, 15 and 30 minutes following instillation of 0.18% sodium hyaluronate (HA).</p><p><strong>Results: </strong>Thirty-one eyes of 31 patients were included. There was a significant difference in post-operative OSI variation when comparing hyperosmolar (0.65±0.30, N=11) to normal subjects (0.33±0.11, N=10, p=0.005). Of note, there were no significant differences in OSI variation when subjects were sorted by staining (p=0.9), TBUT (p=0.7), symptoms (p=0.7), or MGD status (p=0.9). Instillation of 0.18% HA (N=10) did not alter OSI at 5 minutes, but significant reductions in OSI of 28.8%, 38.5% and 36.7% (all p < 0.001) were observed at 10, 15 and 30 minutes.</p><p><strong>Conclusion: </strong>Hyperosmolar patients exhibited significantly increased variation in light scatter following cataract surgery that was undifferentiated by staining or TBUT. Elevated osmolarity may be indicative of light scatter equivalent to that of a grade 2-3 cataract.</p>","PeriodicalId":93945,"journal":{"name":"Clinical ophthalmology (Auckland, N.Z.)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11366549/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142121341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Harinto Nur Seha, Achmad Jaelani Rusdi, Demiawan Rachmatta Putro Mudiono
{"title":"Response to \"Telemedicine at a University Ophthalmology Practice During the Beginning of the COVID-19 Pandemic\" [Letter].","authors":"Harinto Nur Seha, Achmad Jaelani Rusdi, Demiawan Rachmatta Putro Mudiono","doi":"10.2147/OPTH.S492725","DOIUrl":"10.2147/OPTH.S492725","url":null,"abstract":"","PeriodicalId":93945,"journal":{"name":"Clinical ophthalmology (Auckland, N.Z.)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11366252/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142115995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Changes in Ocular Blood Flow After Intravitreal Injection for Diabetic Macular Edema Between Aflibercept and Faricimab.","authors":"Takahiro Mizukami, Saya Mizumoto, Takuya Ishibashi, Satoru Ueno, Takayo Toyonishi, Kuniko Tachibana, Soichiro Mishima, Yoshikazu Shimomura","doi":"10.2147/OPTH.S476307","DOIUrl":"10.2147/OPTH.S476307","url":null,"abstract":"<p><strong>Purpose: </strong>In this study, we aimed to evaluate and compare the effects of intravitreal aflibercept (IVA) and intravitreal faricimab (IVF) injections on the blood flow of retinal vessels in the peripapillary region and optic nerve head (ONH) in eyes with diabetic macular edema (DME) using laser speckle flowgraphy (LSFG).</p><p><strong>Patients and methods: </strong>This study included 20 eyes of 18 patients treated with IVA and 15 eyes of 11 patients treated with IVF for DME. The mean blur rate (MBR) of the ONH and retinal artery and vein of the peripapillary region were measured using LSFG at baseline and 1 month after injection. Central retinal thickness (CRT) and best-corrected visual acuity (BCVA) were measured for all patients.</p><p><strong>Results: </strong>CRT decreased significantly in both IVA-treated (<i>p</i> = 0.0003) and IVF-treated groups (<i>p</i> = 0.0004). Some of the MBR-related parameters of the ONH, such as MBR of all areas (MA), MBR of vascular areas (MV), and MBR of tissue areas (MT), decreased significantly 1 month after IVA and IVF compared to baseline values (MA of IVA, <i>p</i> < 0.0001; MT of IVA, <i>p</i> = 0.0220; MA of IVF, <i>p</i> = 0.0002; MT of IVF, <i>p</i> = 0.0461). MBR of the retinal artery (MBR-A) and vein (MBR-V) also decreased significantly 1 month after IVA and IVF compared with baseline values (MBR-A of IVA, <i>p</i> = 0.0002; MBR-V of IVA, <i>p</i> = 0.0010; MBR-A of IVF, <i>p</i> = 0.0368). No significant difference in ocular perfusion was observed between the IVA-treated and IVF-treated groups.</p><p><strong>Conclusion: </strong>Intravitreal injection led to a reduction in ocular blood flow in both retinal peripapillary vessels and the ONH in both IVA-treated and IVF-treated groups. No significant difference was observed in MBR reduction between the IVA-treated and IVF-treated groups. Our findings warrant further long-term investigations to reveal differences between aflibercept and faricimab.</p>","PeriodicalId":93945,"journal":{"name":"Clinical ophthalmology (Auckland, N.Z.)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11365510/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142115993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Salma Firdaus, Lívia Figueiredo Pereira, Ge Yang, Yumin Huang-Link
{"title":"Interocular Symmetry and Intermachine Reproducibility of Optic Disc and Macular Parameters Measured by Two Different Models of Optical Coherence Tomography.","authors":"Salma Firdaus, Lívia Figueiredo Pereira, Ge Yang, Yumin Huang-Link","doi":"10.2147/OPTH.S465360","DOIUrl":"10.2147/OPTH.S465360","url":null,"abstract":"<p><strong>Purpose: </strong>To compare the interocular symmetry and investigate the intermachine reproducibility of optic disc and macular data measured by spectral-domain high-definition optical coherence tomography (HD-OCT) Cirrus HD-OCT 4000 and HD-OCT 5000 from healthy subjects.</p><p><strong>Patients and methods: </strong>Forty-three volunteers were examined with both HD-OCT 4000 and HD-OCT 5000 at the same visit. Optic nerve head (ONH) and macular data were acquired using ONH Cube 200×200 scans and macular volume cube 512×128 scans, respectively.</p><p><strong>Results: </strong>The average age of the participants was 33 ± 8.6 years. Interocular OCT parameters of ONH and macula showed a high correlation between the right and left eyes regardless of HD-OCT models, displaying a low coefficient of variation (CV). However, the average retinal nerve fiber layer (RNFL) was thicker (96.67±11.19µm vs 95.3±10.89µm, p<0.01), and the average central subfield thickness (261.51±17.45µm vs 262.51±17.39 µm, p<0.01) and cube average thickness (283.91± 13.59µm vs 286.55±13.09µm, p<0.05) were thinner when measured by Cirrus 4000 compared to 5000. Intermachine reproducibility and reliability of RNFL and macular parameters exhibited a high intraclass correlation coefficient (ICC) (0.985) and low CV (2.4%). Ganglion cell-inner plexiform layer (GCIPL) measured by two OCT models showed similar values with an average thickness of 85 µm and had high intermachine reproducibility with high ICC (0.993) and low CV (1.2%).</p><p><strong>Conclusion: </strong>High interocular symmetry was observed across both HD-OCT models. Intermachine reproducibility for RNFL and all macular parameters was also high. GCIPL showed minimal intermachine differences with high reproducibility and reliability. Thus, the results imply that GCIPL values measured by two Cirrus OCT models may be used interchangeably.</p>","PeriodicalId":93945,"journal":{"name":"Clinical ophthalmology (Auckland, N.Z.)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11363946/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142115994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}