purpose : to compare visual outcome of aspheric and spheric intraocular lenses (iols) implantation in patients with age-related cataract in terms of visual acuity (va), contrast sensitivity (cs) and spherical aberration methods : in this prospective randomized interventional study, 59 consecutive cases of senile cataract who had been admitted for cataract surgery to farabi eye hospital, tehran,...

The importance of the human contrast sensitivity function (CSF) in a color image difference metric is examined. The contrast sensitivity function is used to extend traditional color difference equations for use with complex image stimulus. Three CSF models of various complexities are evaluated using psychophysical image difference data. Additionally, two models of spatial frequency adaptation a...

dear editor: thank you for your letter ref. no 2003-2 dated 7 november 2010 regarding the comments of an ophthalmologist from thailand named professor viroj wiwan on my article titled “evaluation of contrast sensitivity, color vision and visual acuity in patients with and without diabetes”. he has suggested that the combination of existing tests may be a good way to increase the sensitivity of ...