Best way to measure accommodation

Article

Defocus curve measurement of subjective amplitude of accommodation (AoA) is not affected by non-randomized letter sequences in presbyopic subjects, according to results of a study published in the August 2008 issue of the Journal of Cataract & Refractive Surgery.

Defocus curve measurement of subjective amplitude of accommodation (AoA) is not affected by non-randomized letter sequences in presbyopic subjects, according to results of a study published in the August 2008 issue of the Journal of Cataract & Refractive Surgery.

Nayneet Gupta of the Ophthalmic Research Group, School of Life and Health Sciences, Aston University, Birmingham, UK and colleagues measured defocus curves (from +3.00 D to -3.00 D in 0.5 D increments) with various combinations of randomized and non-randomized letter sequences and/or lens presentation order in presbyopic subjects (n=20) to establish the most accurate way of calculating AoA in this manner. Objective and subjective AoA were measured.

The team observed that defocus curve measurements were not affected by which lens-presentation or letter sequence was used, although in combination the measurements obtained were less than desirable.

Thus the researchers concluded that, to measure subjective AoA by defocus curves, either non-randomized letter sequences or lens presentation could be used effectively.

Newsletter

Join ophthalmologists across Europe—sign up for exclusive updates and innovations in surgical techniques and clinical care.

Recent Videos
Alfredo Sadun, MD, PhD, chief of Ophthalmology at the Doheny Eye Institute, University of California Los Angeles, shared exciting new research with the Eye Care Network during the Association for Research in Vision and Ophthalmology (ARVO) meeting on the subject of Leber hereditary optic neuropathy (LHON).
At this year's Association for Research in Vision and Ophthalmology (ARVO) meeting in Salt Lake City, Utah, Nitish Mehta, MD, shared highlights from his research documenting real-world results of aflibercept 8 mg for patients with diabetic macular oedema.
ARVO 2025: Anat Loewenstein, MD, shares data from herself and her colleagues on meeting needs of patients with diabetic retinopathy
At the American Society of Cataract and Refractive Surgeons annual meeting, Sheng Lim, MD, FRCOphth discusses the benefit of endoscopic cyclophotocoagulation for patients with primary open angle glaucoma and cataracts in the CONCEPT study
A photo of Seville, Spain, with the Congress on Controversies in Ophthalmology logo superimposed on it. Image credit: ©francovolpato – stock.adobe.com; logo courtesy COPHy
Anat Loewenstein, MD, Professor and Director, Department of Ophthalmology, Tel Aviv Medical Center, discusses the Congress on Controversies in Ophthalmology (COPHy)
Anat Loewenstein, MD, speaks about the 22nd Annual Angiogenesis, Exudation, and Degeneration Meeting in February 2025 and shares her global forecast for AI-driven home OCT
Sarah M. Thomasy, DVM, PhD, DACVO, a veterinary ophthalmologist at UC Davis, talks about how her research at the Glaucoma 360 symposium
I. Paul Singh, MD, an anterior segment and glaucoma specialist, discusses the Glaucoma 360 conference, where he participated in a panel discussion on the use of artificial intelligence (AI) in glaucoma care.
Charles Wykoff, MD, PhD, discusses his Floretina ICOOR presentation topic, retinal non-perfusion in diabetic retinopathy, with David Hutton, editor of Ophthalmology Times
© 2025 MJH Life Sciences

All rights reserved.