Intra-ocular light scatter in pseudophakia

Abstract

In 22 patients (23 eyes), who had undergone an uncomplicated cataract extraction with implantation of a posterior chamber lens in otherwise normal eyes 11 to 44 weeks previously, the intra-ocular light scatter was measured with an IOI stray light meter. All the eyes examined had little or no after-cataract. A regression curve for stray light values in normal eyes as function of age was used as reference. The measurements show that the intra-ocular light scatter in pseudophakic eyes with little or no after-cataract increases by a factor 2. This increase must be caused by the combination implant lens-posterior capsule.

Effect of neodymium:YAG laser capsulotomy on retinal straylight values in patients with posterior capsule opacification

“…However, there is often a discrepancy between these 2 guiding principles and the degree of the patient's visual impairment. [1][2][3][4][5][6] Many patients with PCO have disability glare, which is defined as a reduction in visual capacity resulting from a nearby glare source and is the result of forward intraocular light scatter. The international standards committee Commission International de l'Eclairage quantifies disability glare as straylight.…”

Retinal contrast loss with non-monofocal IOLs

“…This may cause the optical condition of the eye to be less than perfect, even in patients without after-cataract. In fact it has been reported that in patients with IOLs as a rule straylight is increased [7].…”

Negative dysphotopsia: The enigmatic penumbra

“…[46][47][48][49] reported negative dysphotopsia in 15.2% on the first postoperative day, 3.2% at 1 year, and 2.4% at 2 to 3 years. In Figure 15, we see that as long as the nasal capsule remains clear, there is no light scattered into the shadow.…”