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

Get the essential updates shaping the future of pharma manufacturing and compliance—subscribe today to Pharmaceutical Technology and never miss a breakthrough.

Recent Videos
Omer Trivizki, MD, MBA, a retina specialist from Tel Aviv Medical Center, speaks about VOY-101, a Novel, Complement-Modulating Gene Therapy for Geographic Atrophy at the American Society of Retina Specialists (ASRS) Annual Meeting
João Pedro Marques, MD, MSc, PhD discusses a retrospective study of 800 patients with inherited retinal diseases during the American Society of Retina Specialists (ASRS) annual meeting
Christine Curcio, PhD, of the University of Alabama at Birmingham Heersink School of Medicine, shares histology update and revised nomenclature for OCT with Sheryl Stevenson of the Eye Care Network and Ophthalmology Times
© 2025 MJH Life Sciences

All rights reserved.