A Study of Night Myopia

摘要: The phenomenon of night myopia, wherein the eye becomes relatively nearsighted in dim light, was investigated detail using high contrast grating test objects. Night myopia first appeared at brightness level where rod vision began to take place and grew larger as further reduced. At lowest investigated, attained a value 1.5 2.0 diopters, depending upon observer. when accommodation prevented by an optical method also paralyzed with homatropine. It therefore concluded that not significant cause observers examined.The spherical aberration observers’ eyes measured, its effect effective focal length aid artificial pupils. Also studied were properties simple glass lens having approximating eye. All tests showed dependence level, is primarily result undercorrected For some eyes, homatropine reduced slightly, but only extent it aberration. A review literature included.