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[Measurement of apparent accommodation with a 20/20 near vision optotype]
Y Nawa1, M Nakatsuka, T Yoshii
1Department of Ophthalmology, Nara Medical University, 840 Shijo-cho, Kashihara 634-8522, Japan.
Nippon Ganka Gakkai Zasshi
|April 3, 2001
Summary
Measuring apparent accommodation with a small 20/20 near vision optotype revealed lower values in most patients post-cataract surgery. However, some individuals still exhibit three diopters of apparent accommodation, highlighting the importance of optotype size for accurate visual function analysis.
Area of Science:
- Ophthalmology
- Optometry
- Vision Science
Context:
- Apparent accommodation measurement variability necessitates standardized methods.
- Cataract surgery and intraocular lens (IOL) implantation can affect visual function.
- Accurate assessment of near vision is crucial for post-operative patient care.
Purpose:
- To investigate the impact of using a small 20/20 near vision optotype on apparent accommodation measurements.
- To determine the range of apparent accommodation in patients after cataract surgery.
- To establish optimal methodology for assessing visual function post-IOL implantation.
Summary:
- Apparent accommodation was measured in 46 eyes of 38 patients (45-84 years) post-cataract surgery using a 20/20 near vision optotype.
- The study found apparent accommodation values ranging from 0.00 to 3.00 D, with a median of 0.50 D.
- Most eyes showed lower apparent accommodation compared to previous studies when using a small optotype and correcting astigmatism.
Impact:
- Utilizing the smallest feasible near vision optotype is recommended for precise apparent accommodation measurement.
- The findings underscore the existence of significant apparent accommodation even in post-surgical eyes.
- This research contributes to refining methods for evaluating high-quality visual function in ophthalmic patients.