Carlos Carpena-Torres , Fernando Huete-Toral , Gonzalo Carracedo
{"title":"Blue light stimulation of the optic nerve head reduces melatonin levels in rabbit posterior segment","authors":"Carlos Carpena-Torres , Fernando Huete-Toral , Gonzalo Carracedo","doi":"10.1016/j.optom.2024.100525","DOIUrl":"10.1016/j.optom.2024.100525","url":null,"abstract":"","PeriodicalId":46407,"journal":{"name":"Journal of Optometry","volume":"17 4","pages":"Article 100525"},"PeriodicalIF":2.2,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142510167","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}
Anabel Martínez-Espert , Diego Montagud-Martínez , Vicente Ferrando , Salvador García-Delpech , Juan A. Monsoriu , Walter D. Furlan
{"title":"Visual performance of a new trifocal intraocular lens design evaluated with a clinical adaptative optics visual simulator","authors":"Anabel Martínez-Espert , Diego Montagud-Martínez , Vicente Ferrando , Salvador García-Delpech , Juan A. Monsoriu , Walter D. Furlan","doi":"10.1016/j.optom.2024.100527","DOIUrl":"10.1016/j.optom.2024.100527","url":null,"abstract":"<div><h3>Objective</h3><div>The digital transformation of daily routines has increased visual demands, especially at intermediate and near distances. The Devil multifocal intraocular lens (MIOL) design was developed to enhance intermediate visual performance. This design is a novel trifocal intraocular lens inspired by the fractal structure known as the 'Devil's staircase'. The aim of this research is to evaluate the visual performance of the Devil MIOL design in real patients.</div></div><div><h3>Methods</h3><div>The visual acuity defocus curve was obtained from 25 eyes of healthy volunteers using the Visual Adaptive Optics Simulator (VAO, Voptica SL, Murcia, Spain). Additionally, images of optotypes simulating those seen through the Devil MIOL design were captured to qualitatively illustrate optotype perception at different vergence values.</div></div><div><h3>Results</h3><div>Mean visual acuity values of the evaluation were 0.03 logMAR at 0.00 D vergence, 0.10 logMAR at +1.50 D vergence, and 0.11 logMAR at +3.00 D vergence, corresponding to far (optical infinity), intermediate (66.7 cm), and near foci (33.3 cm), respectively. The experimental outcomes were indeed slightly better than numerical results obtained previously in a model eye.</div></div><div><h3>Conclusions</h3><div>The Devil MIOL design provides satisfactory visual acuity across three primary foci and produces extended depth of focus between the intermediate and near foci.</div></div>","PeriodicalId":46407,"journal":{"name":"Journal of Optometry","volume":"17 4","pages":"Article 100527"},"PeriodicalIF":2.2,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142649102","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}
Maciej Dymczyk, Anna Przekoracka-Krawczyk, Zuzanna Kapturek, Paulina Pyżalska
{"title":"Effect of a vergence-accommodation conflict induced during a 30-minute Virtual Reality game on vergence-accommodation parameters and related symptoms","authors":"Maciej Dymczyk, Anna Przekoracka-Krawczyk, Zuzanna Kapturek, Paulina Pyżalska","doi":"10.1016/j.optom.2024.100524","DOIUrl":"10.1016/j.optom.2024.100524","url":null,"abstract":"<div><h3>Purpose</h3><div>The aim of the study was to verify the hypotheses that vergence-accommodation conflict (VAC) induced with head-mounted device (HMD) could cause symptoms in relation to changes in the accommodative-vergence system. In order to test this hypothesis, the Virtual Reality (VR) exposures were carried out in two types of VAC: VAC<sub>small</sub> and VAC<sub>large</sub>.</div></div><div><h3>Method</h3><div>Eighteen females, with a mean age of 22.5 ± 2.0 years, participated in two 30-minutes sessions with VR, which were separated by at least one week. Two sessions were differentiated by intensity of VAC presented in the VR system (VAC<sub>small</sub> and VAC<sub>large</sub>). Visual parameters were measured such as associated and dissociated phoria, accommodative response, the near point of convergence (NPC), fusional vergence ranges (FVR) and subjective complaints were measured using Simulator Sickness Questionnaire (SSQ). The parameters were measured immediately before (Pre-test) and after (Post-test) the VR exposure.</div></div><div><h3>Results</h3><div>The subjective symptoms as nausea, oculomotor disorders and disorientation increased significantly after 30-minutes of exposure on VAC<sub>large</sub> (<em>P</em><0.05). The associated and dissociated phoria, lag of accommodation, FVR and the NPC did not significantly change after the VR exposure (<em>P</em>>0.05).</div></div><div><h3>Conclusion</h3><div>Short-term use of HMD (30-min) did not significantly affect accommodative-vergence functions regardless of the size of VAC (VAC<sub>small</sub> and VAC<sub>large</sub>). However, the level of symptoms increased after VR sessions, which was probably related to inappropriate oculo-vestibular relationship.</div></div>","PeriodicalId":46407,"journal":{"name":"Journal of Optometry","volume":"17 4","pages":"Article 100524"},"PeriodicalIF":2.2,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142630199","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}
Rafael Carrasco Solís , María Rosario Rodríguez Griñolo , Beatríz Ponte Zúñiga , Beatriz Mataix Albert , María Leticia LLedó de Villar , Rocío Martínez de Pablos , Enrique Rodríguez de la Rúa Franch
{"title":"Analysis of patient referrals from primary care to ophthalmology. The role of the optometrist","authors":"Rafael Carrasco Solís , María Rosario Rodríguez Griñolo , Beatríz Ponte Zúñiga , Beatriz Mataix Albert , María Leticia LLedó de Villar , Rocío Martínez de Pablos , Enrique Rodríguez de la Rúa Franch","doi":"10.1016/j.optom.2024.100521","DOIUrl":"10.1016/j.optom.2024.100521","url":null,"abstract":"<div><h3>Purpose</h3><div>The aim of this study was to characterize the quality of primary care referrals of patients to ophthalmology at the Virgen Macarena Hospital in Seville. This will enable us to optimize ophthalmologic resources and to evaluate the role of the optometrist in improving referrals.</div></div><div><h3>Methods</h3><div>We performed a retrospective cross-sectional review of 220 ophthalmology consultations referred from primary care to the hospital from March to May 2022.</div><div>The following data were extracted: age, sex, reason for consultation, diagnosis, priority level, whether it was an initial consultation or a follow-up visit, whether there was a secondary referral and whether the referral was appropriate. Excel (version 2312) was used for the data analysis.</div></div><div><h3>Results</h3><div>The age range of the patients was from 3 years to 91 years. The patients were 41.8 % male and 58.2 % female. The conditions found were grouped as follows: cataracts (27.27 %), refractive errors (20.9 %), anterior segment disease (18.8 %), posterior segment disease (14.07 %), normal examination (18.63 %) and others (0.9 %). The most common reason for consultation was blurred vision or loss of vision (43.63 %). In total, 41.36 % of the consultations were considered inappropriate. The age group requiring the highest number of consultations was over 65 years (38.64 %).</div></div><div><h3>Conclusions</h3><div>With 41.36 percent of referrals deemed unnecessary, it is clear that referrals can be improved. This would reduce strain on the ophthalmology service and improve patient care. The importance of the optometrist in primary care is demonstrated by the fact that 20.9 % of the diagnoses were refractive errors.</div></div>","PeriodicalId":46407,"journal":{"name":"Journal of Optometry","volume":"17 4","pages":"Article 100521"},"PeriodicalIF":2.2,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142320315","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}
Clara Martínez-Pérez , Jacinto Santodomingo-Rubido , Cesar Villa-Collar , Julia Bodas-Romero , Gonzalo Carracedo , María Serramito Blanco , Asaki Suzaki
{"title":"Corneal higher-order aberrations in different types of irregular cornea","authors":"Clara Martínez-Pérez , Jacinto Santodomingo-Rubido , Cesar Villa-Collar , Julia Bodas-Romero , Gonzalo Carracedo , María Serramito Blanco , Asaki Suzaki","doi":"10.1016/j.optom.2024.100522","DOIUrl":"10.1016/j.optom.2024.100522","url":null,"abstract":"<div><h3>Objetive</h3><div>To assess differences in corneal higher-order aberrations (i.e., HOAs) between six different types of irregular corneas (i.e, keratoconus (KC), keratoglobus (KG), pellucid marginal degeneration (PMD), laser-assisted in situ keratomileusis (LASIK), penetrating keratoplasty (PK), and intrastromal corneal ring segments (ICRS)).</div></div><div><h3>Methods</h3><div>Corneal aberration data from the 3<sup>rd</sup> and 4<sup>th</sup> order together with secondary vertical and horizontal coma, and secondary spherical aberration were retrospectively retrieved from a corneal tomographer and compared between irregular cornea types and for 3-, 5-, and 7-mm pupil diameters.</div></div><div><h3>Results</h3><div>Significant differences were observed in vertical coma, oblique trefoil, secondary oblique astigmatism, primary spherical, and secondary spherical between irregular cornea types across all three pupil sizes (all p≤0.025). Vertical coma consistently exhibited the greatest magnitude of HOA across all irregular cornea types and pupil diameters. For the larger pupil diameters (5 and 7 mm), the 3rd order aberrations (mainly coma-like), the 4th order aberrations (mainly spherical-like), and total HOA RMS were significantly lower in the LASIK group compared to all other irregular cornea types (all p≤0.003). Additionally, at pupil sizes of 5 and 7 mm, the 3rd, 4th, coma-like, spherical-like, and total HOA RMS were significantly lower in KC compared to the ICRS and PK groups (all p≤0.01). Furthermore, the 4th, spherical-like, and total HOA RMS were significantly lower in KC compared to KG at pupil diameters of 3 and 7 mm, 5 and 7 mm, and 7 mm, respectively (all p≤0.03).</div></div><div><h3>Conclusions</h3><div>Vertical coma was the most elevated HOA across all irregular cornea types and pupil diameters. Corneal aberrations were lower in LASIK and KC, and higher in KG and PK.</div></div>","PeriodicalId":46407,"journal":{"name":"Journal of Optometry","volume":"17 4","pages":"Article 100522"},"PeriodicalIF":2.2,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1888429624000104/pdfft?md5=01a0535522c52aaec155dab0857ec429&pid=1-s2.0-S1888429624000104-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142310354","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}
Hassan Hashemi , Mehdi Khabazkhoob , Samira Heydarian , Mohammad Hassan Emamian , Akbar Fotouhi
{"title":"Intraocular pressure and its association with ocular biometrics in Iranian children","authors":"Hassan Hashemi , Mehdi Khabazkhoob , Samira Heydarian , Mohammad Hassan Emamian , Akbar Fotouhi","doi":"10.1016/j.optom.2024.100523","DOIUrl":"10.1016/j.optom.2024.100523","url":null,"abstract":"<div><h3>Purpose</h3><p>To determine the mean value and normative distribution of intraocular pressure (IOP) in children and their association with demographic and ocular biometrics.</p></div><div><h3>Methods</h3><p>Cluster sampling was done to select the students in urban areas of Shahroud, northeast Iran, while all students living in rural areas were selected. IOP was measured in mmHg using a non-contact tonometer, along with corneal and retinal imaging and ocular biometric measurement.</p></div><div><h3>Results</h3><p>After applying the exclusion criteria, 9154 eyes of 4580 students were analyzed, of whom 2377 (51.9 %) were boys. The mean age of the participants was 12.35±1.73 years (range: 9–15 years). The mean IOP was 15.58±2.83 (15.47–15.69) in total, 15.31±2.77 (15.17–15.46) in boys, and 15.88±2.86 (15.73–16.03) in girls (<em>p</em> < 0.001). The mean IOP was 15.07 and 15.49 in students aged 9 and 15 years, respectively. The mean IOP was 15.7 ± 2.64 (15.58–15.81) in urban and 14.52±4.05 (14.27–14.77) in rural students (<em>p</em> < 0.001). In the multiple generalized estimating equation model, IOP had a positive association with female sex (β=0.84, <em>P</em> < 0.001), systolic blood pressure (β=0.02, <em>P</em> < 0.001), cup volume (β=0.99, <em>P</em> < 0.001), corneal thickness (β=0.04, <em>P</em> < 0.001) and anterior chamber volume (β=0.007, <em>P</em> < 0.001) and a negative association with living in the rural area (β=−0.65, <em>P</em> < 0.001), rim area (β=−0.39, <em>P</em> < 0.001), and corneal diameter (β=−0.18, <em>P</em> = 0.045). Furthermore, individuals with myopia exhibited a significantly higher IOP (β=0.35, <em>P</em> < 0.001) compared to those with emmetropia.</p></div><div><h3>Conclusion</h3><p>This study showed the normative distribution of IOP and its associated factors in children. The results can be used in diagnosis and management of glaucoma.</p></div>","PeriodicalId":46407,"journal":{"name":"Journal of Optometry","volume":"17 4","pages":"Article 100523"},"PeriodicalIF":2.2,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1888429624000116/pdfft?md5=302bb87452dbc79545cbcaf70b1090ed&pid=1-s2.0-S1888429624000116-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142270724","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}
Ho-yin Wong , Ricky Ahmat , Benny Chung-ying Zee , Simon Chun-wa Luk , Gladys Lai-ying Cheing , Andrew Kwok-cheung Lam
{"title":"Comparison of macular thickness in diabetic patients acquired from optical coherence tomography mode and optical coherence tomography angiography mode in Cirrus HD-OCT 5000","authors":"Ho-yin Wong , Ricky Ahmat , Benny Chung-ying Zee , Simon Chun-wa Luk , Gladys Lai-ying Cheing , Andrew Kwok-cheung Lam","doi":"10.1016/j.optom.2024.100519","DOIUrl":"10.1016/j.optom.2024.100519","url":null,"abstract":"<div><h3>Purpose</h3><p>To compare macular thickness obtained using two different modes of image acquisitions with Cirrus HD-OCT 5000.</p></div><div><h3>Methods</h3><p>Patients with diabetes were recruited and macular thickness were obtained using optical coherence tomography (OCT) mode and optical coherence tomography angiography (OCTA) mode. The OCT mode involved a Macular Cube (512×128 pixels) centred on the fovea covering a 6 × 6 mm<sup>2</sup> macular region. The OCTA acquisition involved scanning of a 6 × 6 mm² scan (350×350 pixels) centred on the fovea. Data was exported and compared according to the Early Treatment Diabetic Retinopathy Study (ETDRS) subfields. Fixation deviation was defined as the deviation of the foveal point from the grid center in the OCT scan and OCTA scan.</p></div><div><h3>Results</h3><p>Eighty-six diabetic patients were recruited had similar macular thickness in all ETDRS subfield except the superior outer sector. The 95 % limits of agreement between the two modes were within 9.7μm to -9.0μm. It took longer to complete each OCTA mode (median of 7.4 s) than the OCT mode (median time of 5.8 s) (Wilcoxon test, <em>p</em> < 0.001), but OCTA generated a smaller fixation deviation (median 68.8μm) than the OCT mode (median 103.0μm) (Wilcoxon test, <em>p</em> = 0.014).</p></div><div><h3>Conclusions</h3><p>Improved fixation in OCTA compared with OCT was evident, likely because of the faster scanning speed and higher sampling density of OCTA. Macular thickness was found similar. There appears no requirement to obtain macular thickness measurements using a separate OCT mode. This approach can reduce patient chair time, improve patient comfort, and streamline the clinical workflow.</p></div>","PeriodicalId":46407,"journal":{"name":"Journal of Optometry","volume":"17 4","pages":"Article 100519"},"PeriodicalIF":2.2,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1888429624000074/pdfft?md5=3963b1936e4edd53c5b45bf47cbf4152&pid=1-s2.0-S1888429624000074-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142146575","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}
José M. González-Méijome , David P. Piñero , César Villa-Collar
{"title":"JOptom's Web of Science (WoS) impact factor","authors":"José M. González-Méijome , David P. Piñero , César Villa-Collar","doi":"10.1016/j.optom.2024.100520","DOIUrl":"10.1016/j.optom.2024.100520","url":null,"abstract":"","PeriodicalId":46407,"journal":{"name":"Journal of Optometry","volume":"17 4","pages":"Article 100520"},"PeriodicalIF":2.2,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1888429624000086/pdfft?md5=fb0c842603735008ec5bebc9e2cbf1e8&pid=1-s2.0-S1888429624000086-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142129563","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}
Vila-Vidal Núria , Vinuela-Navarro Valldeflors , Pérez-Corral Joan , Galdón Alba , Tomás Núria , González Enric , Guisasola Laura
{"title":"Relationship between socioeconomic status and myopia in school children: CISViT project","authors":"Vila-Vidal Núria , Vinuela-Navarro Valldeflors , Pérez-Corral Joan , Galdón Alba , Tomás Núria , González Enric , Guisasola Laura","doi":"10.1016/j.optom.2024.100518","DOIUrl":"10.1016/j.optom.2024.100518","url":null,"abstract":"<div><h3>Purpose</h3><p>Evidence indicates the existence of an association between socioeconomic status (SES) and the prevalence of myopia in the adult population. In contrast, there are limited studies investigating this association in children. The purpose of this study was to investigate the association between the presence of myopia in 8-year-old children from southern Europe and SES defined as parental educational level and employment status.</p></div><div><h3>Methods</h3><p>Participants aged 8 years old were recruited from 16 schools located in Terrassa, Spain (<em>n</em> = 813). Ten of these schools were classified as “high complexity” schools (low SES). Refractive error was assessed using non-cycloplegic retinoscopy. Parental questionnaires were used to gather socioeconomic information such as parental education level and employment status. Non-parametric Kruskal Wallis, Mann Whitney and Chi-square tests were used to evaluate the association between spherical equivalent (SE) and parental educational level and employment status as well as differences in the SE distribution between high-complexity and regular schools.</p></div><div><h3>Results</h3><p>Myopia was more prevalent than hyperopia in the population sample (11.1% vs 5.1 %). Chi-square tests revealed a significant association between attending “high-complexity” schools and the presence of myopia (<em>p</em> = 0.014). In contrast, no significant associations were found between SE and SES. A trend for higher prevalence of myopia in children whose mothers had low educational level and were unemployed was observed.</p></div><div><h3>Conclusions</h3><p>While no significant associations are found between SE and parental education or employment status, myopia is more frequently found in schools with low SES (“high-complexity” schools), suggesting a potential link between SES and childhood myopia.</p></div>","PeriodicalId":46407,"journal":{"name":"Journal of Optometry","volume":"17 4","pages":"Article 100518"},"PeriodicalIF":2.2,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1888429624000062/pdfft?md5=a3ecd10c65a6e247d7aaa991cf66d5a8&pid=1-s2.0-S1888429624000062-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141789448","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}
Carmen López-de-la-Fuente, Elena Saz-Onrubia, Elvira Orduna-Hospital, Ana Sánchez-Cano
{"title":"Comparison of two visual-verbal tests of ocular motility using an eye-tracker","authors":"Carmen López-de-la-Fuente, Elena Saz-Onrubia, Elvira Orduna-Hospital, Ana Sánchez-Cano","doi":"10.1016/j.optom.2024.100517","DOIUrl":"https://doi.org/10.1016/j.optom.2024.100517","url":null,"abstract":"<div><h3>Purpose</h3><p>This study aims to compare eye movements monitored with an eye tracker during two visuo-verbal tests for assessing ocular motility. The study explores the potential of digital assessment and eye tracking technology in enhancing the understanding of ocular motility during these tests.</p></div><div><h3>Methods</h3><p>47 healthy participants were included (20 males, 27 females), with a mean age of 21.34±1.77 years. The participants underwent optometric examinations to ensure visual health and exclude any dysfunctions or pathologies. The experimental protocol involved the digitized versions of the DEM and King-Devick tests, monitored with an eye tracker.</p></div><div><h3>Results</h3><p>The vertical subtests of DEM test showed fewer saccades, longer fixation durations, smaller saccade amplitudes, and slower saccade speeds compared to the horizontal subtest. The King-Devick test exhibited comparable fixation and saccade numbers, while fixation duration slightly increased with test difficulty. Statistically significant differences were found between the tests, but a positive correlation was observed.</p></div><div><h3>Conclusions</h3><p>Statistically significant differences were observed between the DEM and King-Devick tests, indicating that they measure similar aspects but are not interchangeable. The DEM test offers more comprehensive information with vertical saccade assessment. Test duration correlates positively with saccade and fixation count, fixation duration, and saccade speed.</p></div>","PeriodicalId":46407,"journal":{"name":"Journal of Optometry","volume":"17 4","pages":"Article 100517"},"PeriodicalIF":2.2,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1888429624000050/pdfft?md5=56e8ab0927ccd7431201e499e9656fc9&pid=1-s2.0-S1888429624000050-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141438942","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}