{"title":"轻度圆锥角膜患者主观与客观屈光测量的关系。","authors":"Masoud Khorrami-Nejad, Ahmed Kamil Dakhil, Hesam Hashemian, Masoud Sadeghi, Reza Yousefi, Foroozan Narooie-Noori","doi":"10.18240/ijo.2025.03.04","DOIUrl":null,"url":null,"abstract":"<p><strong>Aim: </strong>To compare objective dry retinoscopy and subjective refraction measurements in patients with mild keratoconus (KCN) and quantify any differences.</p><p><strong>Methods: </strong>This cross-sectional study was done on 68 eyes of 68 patients diagnosed with mild KCN. Objective dry retinoscopy using autorefractometer and subjective refraction measurements were performed. Sphere, cylinder, J0, J45, and spherical equivalent values were compared between the two techniques.</p><p><strong>Results: </strong>The mean age of 68 patients with mild KCN was 21.32±5.03y (12-35y). There were 37 (54.4%) males. Objective refraction yielded significantly more myopic sphere (-1.44 D <i>vs</i> -0.57 D), higher cylinder magnitude (-2.24 D <i>vs</i> -1.48 D), and more myopic spherical equivalent (-2.56 D <i>vs</i> -1.31 D) compared to subjective refraction (all <i>P</i><0.05). The mean differences were -0.87 D for sphere, -0.76 D for cylinder, and -1.25 D for spherical equivalent. No significant differences were found for J0 and J45 values, indicating agreement in astigmatism axis (<i>P</i>>0.05).</p><p><strong>Conclusion: </strong>In patients with mild KCN, objective dry retinoscopy overestimates the degree of myopia and astigmatism compared to subjective refraction. The irregular cornea in KCN likely impacts objective measurements. Subjective refraction allows compensation for irregularity, providing a more accurate correction. When determining refractive targets, the tendency of objective methods to overcorrect should be considered.</p>","PeriodicalId":14312,"journal":{"name":"International journal of ophthalmology","volume":"18 3","pages":"398-403"},"PeriodicalIF":1.9000,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11865651/pdf/","citationCount":"0","resultStr":"{\"title\":\"Relationship between objective and subjective refraction measurements in patients with mild keratoconus.\",\"authors\":\"Masoud Khorrami-Nejad, Ahmed Kamil Dakhil, Hesam Hashemian, Masoud Sadeghi, Reza Yousefi, Foroozan Narooie-Noori\",\"doi\":\"10.18240/ijo.2025.03.04\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Aim: </strong>To compare objective dry retinoscopy and subjective refraction measurements in patients with mild keratoconus (KCN) and quantify any differences.</p><p><strong>Methods: </strong>This cross-sectional study was done on 68 eyes of 68 patients diagnosed with mild KCN. Objective dry retinoscopy using autorefractometer and subjective refraction measurements were performed. Sphere, cylinder, J0, J45, and spherical equivalent values were compared between the two techniques.</p><p><strong>Results: </strong>The mean age of 68 patients with mild KCN was 21.32±5.03y (12-35y). There were 37 (54.4%) males. Objective refraction yielded significantly more myopic sphere (-1.44 D <i>vs</i> -0.57 D), higher cylinder magnitude (-2.24 D <i>vs</i> -1.48 D), and more myopic spherical equivalent (-2.56 D <i>vs</i> -1.31 D) compared to subjective refraction (all <i>P</i><0.05). The mean differences were -0.87 D for sphere, -0.76 D for cylinder, and -1.25 D for spherical equivalent. No significant differences were found for J0 and J45 values, indicating agreement in astigmatism axis (<i>P</i>>0.05).</p><p><strong>Conclusion: </strong>In patients with mild KCN, objective dry retinoscopy overestimates the degree of myopia and astigmatism compared to subjective refraction. The irregular cornea in KCN likely impacts objective measurements. Subjective refraction allows compensation for irregularity, providing a more accurate correction. When determining refractive targets, the tendency of objective methods to overcorrect should be considered.</p>\",\"PeriodicalId\":14312,\"journal\":{\"name\":\"International journal of ophthalmology\",\"volume\":\"18 3\",\"pages\":\"398-403\"},\"PeriodicalIF\":1.9000,\"publicationDate\":\"2025-03-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11865651/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International journal of ophthalmology\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.18240/ijo.2025.03.04\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/1/1 0:00:00\",\"PubModel\":\"eCollection\",\"JCR\":\"Q2\",\"JCRName\":\"OPHTHALMOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International journal of ophthalmology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.18240/ijo.2025.03.04","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/1 0:00:00","PubModel":"eCollection","JCR":"Q2","JCRName":"OPHTHALMOLOGY","Score":null,"Total":0}
引用次数: 0
摘要
目的：比较轻度圆锥角膜（KCN）患者的客观干性视网膜镜和主观屈光测量并量化差异。方法：对68例轻度KCN患者68只眼进行横断面研究。采用自体屈光计和主观屈光测量进行客观干性视网膜镜检查。比较两种方法的球面、圆柱、J0、J45和球面等效值。结果：68例轻度KCN患者平均年龄21.32±5.03岁（12-35岁）。男性37例（54.4%）。与主观折射相比，客观折射产生更多的近视球（-1.44 D vs -0.57 D），更高的柱面星等（-2.24 D vs -1.48 D）和更多的近视球等效（-2.56 D vs -1.31 D）（所有PP>0.05）。结论：在轻度KCN患者中，与主观屈光相比，客观干性视网膜镜过高估计了近视和散光的程度。KCN的不规则角膜可能影响客观测量。主观折射允许补偿不规则，提供更准确的校正。在确定折光目标时，应考虑客观方法的过正倾向。
Relationship between objective and subjective refraction measurements in patients with mild keratoconus.
Aim: To compare objective dry retinoscopy and subjective refraction measurements in patients with mild keratoconus (KCN) and quantify any differences.
Methods: This cross-sectional study was done on 68 eyes of 68 patients diagnosed with mild KCN. Objective dry retinoscopy using autorefractometer and subjective refraction measurements were performed. Sphere, cylinder, J0, J45, and spherical equivalent values were compared between the two techniques.
Results: The mean age of 68 patients with mild KCN was 21.32±5.03y (12-35y). There were 37 (54.4%) males. Objective refraction yielded significantly more myopic sphere (-1.44 D vs -0.57 D), higher cylinder magnitude (-2.24 D vs -1.48 D), and more myopic spherical equivalent (-2.56 D vs -1.31 D) compared to subjective refraction (all P<0.05). The mean differences were -0.87 D for sphere, -0.76 D for cylinder, and -1.25 D for spherical equivalent. No significant differences were found for J0 and J45 values, indicating agreement in astigmatism axis (P>0.05).
Conclusion: In patients with mild KCN, objective dry retinoscopy overestimates the degree of myopia and astigmatism compared to subjective refraction. The irregular cornea in KCN likely impacts objective measurements. Subjective refraction allows compensation for irregularity, providing a more accurate correction. When determining refractive targets, the tendency of objective methods to overcorrect should be considered.
期刊介绍：
· International Journal of Ophthalmology-IJO (English edition) is a global ophthalmological scientific publication
and a peer-reviewed open access periodical (ISSN 2222-3959 print, ISSN 2227-4898 online).
This journal is sponsored by Chinese Medical Association Xi’an Branch and obtains guidance and support from
WHO and ICO (International Council of Ophthalmology). It has been indexed in SCIE, PubMed,
PubMed-Central, Chemical Abstracts, Scopus, EMBASE , and DOAJ. IJO JCR IF in 2017 is 1.166.
IJO was established in 2008, with editorial office in Xi’an, China. It is a monthly publication. General Scientific
Advisors include Prof. Hugh Taylor (President of ICO); Prof.Bruce Spivey (Immediate Past President of ICO);
Prof.Mark Tso (Ex-Vice President of ICO) and Prof.Daiming Fan (Academician and Vice President,
Chinese Academy of Engineering.
International Scientific Advisors include Prof. Serge Resnikoff (WHO Senior Speciatist for Prevention of
blindness), Prof. Chi-Chao Chan (National Eye Institute, USA) and Prof. Richard L Abbott (Ex-President of
AAO/PAAO) et al.
Honorary Editors-in-Chief: Prof. Li-Xin Xie(Academician of Chinese Academy of
Engineering/Honorary President of Chinese Ophthalmological Society); Prof. Dennis Lam (President of APAO) and
Prof. Xiao-Xin Li (Ex-President of Chinese Ophthalmological Society).
Chief Editor: Prof. Xiu-Wen Hu (President of IJO Press).
Editors-in-Chief: Prof. Yan-Nian Hui (Ex-Director, Eye Institute of Chinese PLA) and
Prof. George Chiou (Founding chief editor of Journal of Ocular Pharmacology & Therapeutics).
Associate Editors-in-Chief include:
Prof. Ning-Li Wang (President Elect of APAO);
Prof. Ke Yao (President of Chinese Ophthalmological Society) ;
Prof.William Smiddy (Bascom Palmer Eye instituteUSA) ;
Prof.Joel Schuman (President of Association of University Professors of Ophthalmology,USA);
Prof.Yizhi Liu (Vice President of Chinese Ophtlalmology Society);
Prof.Yu-Sheng Wang (Director of Eye Institute of Chinese PLA);
Prof.Ling-Yun Cheng (Director of Ocular Pharmacology, Shiley Eye Center, USA).
IJO accepts contributions in English from all over the world. It includes mainly original articles and review articles,
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