Change in retinal image contrast with age in eyes with transparent lenses

Abstract

Retinal image contrast in eyes with transparent lenses degenerated with age. The decrease was most prominent at the middle frequency domain and was due to the increase in HOAs and light-scattering intensity.

Preoperative and postoperative measurements of retinal vessel oxygen saturation in patients with different grades of cataracts

“…By degrading the spatial resolution of the retinal features, the detection of the vessel lumen and exterior can thus impact measurements of the optical density of the retinal vessels (Mita et al. ). The current conventional approach to retinal oximetry consists of white light illumination of the fundus, where the image is subsequently filtered with light filters for spectrophotometric analysis.…”

“…We found that light scatter, which is typical of an ageing lens, can alter retinal vessel oxygen saturation measurements because it can impact the fundus and vessel reflection, which form the basis of the retinal vessel blood oxygen saturation calculation. By degrading the spatial resolution of the retinal features, the detection of the vessel lumen and exterior can thus impact measurements of the optical density of the retinal vessels (Mita et al 2012). The current conventional approach to retinal oximetry consists of white light illumination of the fundus, where the image is subsequently filtered with light filters for spectrophotometric analysis.…”

The effect of simulated cataract light scatter on retinal vessel oximetry

“…This change in ocular media transparency and scattering effect (light diffusion) produced by a cataract can affect both spectral transmission and morphology. By degrading the spatial resolution of the retinal features the detection of the vessel lumen and exterior can thus impact the measurement of optical density of the retinal vessels (Mita et al 2012). Optical density contributes to the calculation of retinal vessel blood oxygen saturation measurements.…”