The effect of accommodative changes on the brightness of the fundus reflex.
This paper demonstrates how accommodation and refractive changes affect the brightness of the reflex observed during retinoscopy. The amount of light entering the peephole of the retinoscope was monitored while accommodation was varied. The light entering the peephole reaches a maximum when the far-point of the eye is co-incident with the retinoscope and drops when the far-point moves behind or in front of the retinoscope. A reduction in the accommodative lag during book retinoscopy would result in brightening of the reflex along with a shift in the "against" direction.
D000065:Accommodation, Ocular; D000328:Adult; D003071:Cognition; D005654:Fundus Oculi; D006801:Humans; D008027:Light; D012018:Reflex