Refractive Error Change at the United States Air Force Academy - Class of 1985.
HARRY G ARMSTRONG AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OH
Pagination or Media Count:
A retrospective refractive error study was made at the USAF Academy n 497, 17-21 yrs old for the 2.5 year period between entrance and third year exams. The entrances SPEQ refractive errors were 37.3, 18.5, and 44.2 hyperopes, emmetropes, and myopes, respectively. A significant p 0.01 mean SPEQ change of -0.18, -0.21, and -0.57 D occured for the hyperopic, emmetropic, ans myopic eyes, respectively. Myopia progression, derived from eyes showing a myopic shift, was -0.42, -0.52, and -0.75 D for the hyperopic, emmetropic, and myopic eyes, respectively. A myopic shift sufficient to cause a change in pilot status or -0.25 D occurred in a high percentage of each refractive error type, and was 47.7 of hyperopes, 41.3 of emmetropes, and 74.0 of myopes, and a clinically significant myopic shift of or -0.50 D was seen in 21.3, 25.0, 55.1 of each type, respectively. This report supplies detailed information on the incidence and rate of myopia progression at the USAF Academy.
- Anatomy and Physiology