Unbiased estimation of the eyeball volume using the Cavalieri principle on computed tomography images.

The size of the eyeball has been the subject of a few studies. None of them used stereological methods to estimate the volume. In the current study, we estimated the volume of eyeball in normal men and women using the stereological methods.

Effect of sildenafil citrate on retinal functions: preliminary report on Humphrey visual field analysis.

Objective: To assess the effect of sildenafil citrate treatment on visual field analysis (VFA) in patients using sildenafil citrate for erectile dysfunction.

Materials And Methods: In this prospective study on 18 male volunteers with erectile dysfunction, bilateral VFA was performed using the Humphrey 30-2 central standard threshold test. White-on-white (W/W) and blue-on-yellow (B/Y) protocols were used prior to treatment (baseline VFA) and after treatment (repeat VFA) with sildenafil citrate.