Accommodative Response in Patients with Central Field Loss: A Matched Case-Control Study
Open Access
- 9 July 2021
- Vol. 5 (3), 35
- https://doi.org/10.3390/vision5030035
Abstract
Purpose: This study was conducted to evaluate the accommodative response in young participants with visual impairment in comparison with visually normal participants. Methods: Fifteen participants with confirmed visual impairment and 30 visually normal participants aged 12–15 years were recruited. Accommodative response was measured using autorefractor (Grand Seiko WV500) at distances of accommodative demand of 33, 25, and 20 cm. The targets were one-line-above participant threshold acuity. The participants’ accommodative responses were compared between both groups after calibration for refractive errors and the vertex distance of the glasses. Visual acuity and refractive status were also assessed. Results: The age was not significantly different between both participant groups. The visual acuity of visually impaired patients was 6/30 to 6/240, and that of visually normal participants was 6/7.5 or better. Ten of the visually impaired patients and 29 of visually normal participants were myopic. In total, 61–73% of visually impaired patients showed an accommodative lead. Five subtypes of accommodative response were observed. In general, the accommodative inaccuracy increased with increasing accommodative demand. However, the visually normal participants largely exhibited an accommodative lag. A mild-to-moderate relationship was observed between visual acuity and accommodative response (r = 0.3–0.5, p < 0.05). Conclusion: Accommodative response in young visually impaired patients can be variable and on an individual basis. Low vision specialists should anticipate accommodative response outside the normal range. Therefore, we shall consider evaluating each patient’s accommodative response before prescribing any near addition lenses. Accommodation inaccuracy is often more complex than predicted due to increased depth of focus caused by reduced visual acuity.Keywords
Funding Information
- King Saud University (00000)
This publication has 46 references indexed in Scilit:
- Visual Discomfort and Objective Measures of Static AccommodationOptometry and Vision Science, 2009
- Minus Lens Stimulated Accommodative Lag as a Function of AgeOptometry and Vision Science, 2009
- Accommodative Response in Pre-presbyopes with Visual Impairment and Its Clinical ImplicationsInvestigative Ophthalmology & Visual Science, 2007
- Accommodative Lag Under Habitual Seeing Conditions: Comparison Between Myopic and Emmetropic ChildrenJapanese Journal of Ophthalmology, 2005
- Frequency of Convergence Insufficiency in Optometry Clinic SettingsOptometry and Vision Science, 1998
- Accommodative response in children and young adults using dynamic retinoscopyOphthalmic and Physiological Optics, 1996
- The Influence of Refractive Correction Upon Disorders of Vergence and AccommodationOptometry and Vision Science, 1995
- A Prospective Study of Treatment of Accommodative InsufficiencyOptometry and Vision Science, 1993
- Effect of Target Proximity on the Open-Loop Accommodative ResponseOptometry and Vision Science, 1990
- THE EFFECT OF REFRACTIVE ERROR ON THE ACCOMMODATIVE RESPONSE GRADIENT*Ophthalmic and Physiological Optics, 1986