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- Title
Progression of lower and higher-order aberrations: a longitudinal study.
- Authors
Vasudevan, Balamurali; Fisher, Brian; Case, Barry; Lam, Phu; Wayman, Jeff
- Abstract
Background The aim of the present study was to investigate the effect of near-work on lower and higherorder aberrations, and its progression over a 9-month period during the school year. Methods Data from 24 young-adult myopic eyes, and 24 non-myopic eyes were used in this investigation. The lower-order aberrations, coma, spherical aberration (SA), and total root mean square (RMS) of higher order aberrations (total HOA) were measured using an openfield iTrace aberrometer, at both the initial baseline evaluation, and then at the follow-up visits over a 9-month period. Pupil size of 4 mm was used for the aberration measurements. Results The group mean (SD) of the subjects (mean age: 23.6 +/- 3.4 years) at the initial and followup visit was 0.47D (0.50D) and 0.31D (0.41D), in the non-myopes and -3.58D (2.08D) and -3.86D (2.14D) in the myopes, respectively. Significant increases in myopic refraction were observed. The group mean (SD) total HOA at the initial and last visit was 0.12 (0.08) and 0.11 (0.06) microns, in the non-myopes, and 0.15 (0.08) and 0.15 (0.08) microns, in the myopes, respectively. The group mean RMS of the coma at the initial and last visit was 0.06 (0.04) and 0.07 (0.05), in the non-myopes, and 0.08 (0.06) and 0.08 (0.06) microns, in the myopes, respectively. The group mean SA of the subjects at the initial and last visit was 0.04 (0.04) and 0.03 (0.03), in the non-myopes, and 0.04 (0.04) and 0.04 (0.04) microns, in the myopes, respectively. Conclusions There was a significant difference in myopic refraction, over the 9-month assessment period. However, no significant difference in total HOA, SA, and coma between the initial and follow-up visits in both the myopes and the non-myopes was observed.
- Subjects
SPHERICAL aberration; MYOPIA; REFRACTIVE errors; HYPEROPIA; MONOCHROMATIC aberration
- Publication
BMC Ophthalmology, 2015, Vol 15, Issue 1, p130
- ISSN
1471-2415
- Publication type
Article
- DOI
10.1186/1471-2415-15-11