Clinical and physical measurements of the cataractous lens

Abstract

In connection with the clinical trial of an anti-cataract drug (Bendazac lysine) a number of examination methods were used to assess the progress of the cataract: slitlamp examination, visual acuity determination, and the measurement of the contrast sensitivity, light scatter in the eye and the autofluorescence and transmission of the lens. In this article the measurements of 43 patients (43 eyes) are presented, taken at the time that medication was started. In this way we can get an impression of the value of these measurements for the study of cataractous lenses. The contrast sensitivity of the cataractous eye is lowered for all spatial frequencies as compared with the normal population. Light scatter is greatly increased. The autofluorescent profile of the lens with nuclear cataract differs markedly from that of the lens with cortical cataract.

Cataract surgery on diabetic patients. A prospective evaluation of risk factors and complications

“…The complicated group in the present study revealed a tendency towards a higher level of lens fluorescence. Different types of cataract in otherwise comparable patients differ significantly in fluorescence level (Van den Brom et al. 1990; Siik et al.…”

The effect of light scattering on multifocal electroretinography

“…corneal scarring, cataract or vitreous haemorrhage) may degrade the retinal image quality (Campbell, 1999). Cataract is one of the common ocular conditions that affects vision of the elderly (Pierscionek and Weale, 1995) and it remains the leading cause of blindness in certain developing countries (Van den Brom et al ., 1990; Khadem, 1999). The unclear ocular media acts as a filter that reduces the illuminance and contrast of the retinal image.…”

Cataract Services in the COVID-19 era: Risk, Consent and Prioritisation

“…Although visual acuity is strongly associated with cataract severity, visual acuity measurement does not take into account glare and contrast sensitivity affecting quality of life. In addition, glare disability with cataracts does not correlate with visual acuity (25,26). However, given the volume of information needed for even a simpli ed prioritisation model alongside the large number of patients on the waiting list, a detailed discussion regarding speci c visual symptoms and quality of life factors would signi cantly increase the workload associated with patient prioritisation.…”