Corneal Light Scattering and Visual Performance in Myopic Individuals With Spectacles, Contact Lenses, or Excimer Laser Photorefractive Keratectomy

Lente de contato de material híbrido em pacientes com ceratocone e astigmatismo miópico composto

“…Muitos estudos têm como objetivo avaliar a acuidade visual obtida com diferentes correções dos erros refrativos, mas os resultados destes não são concordantes (23)(24)(25)(26)(27) . A enorme variabilidade encontrada nestes estudos pode ser devida a uma constante modificação nos desenhos das lentes de contato, diferentes métodos de medida da acuidade visual e/ou amostras de pequeno tamanho (28) .…”

Transparency, swelling and scarring in the corneal stroma

“…Wounds were allowed to heal for up to 19 months. We used an objective measurement for corneal haze developed by Lohmann et al 47 in which haze was determined using a slit-lampmounted charged-coupled device (CCD) system. The results of the haze measurements are shown in Figure 10 and confirm that both a transitory haze (which peaks after a month) and a more persistent or late developing haze (which remains for many months) occur.…”

Understanding disability glare: light scatter and retinal illuminance as predictors of sensitivity to contrast

“…There are also a number of other individual differences -initial thresholds, iris pigmentation [50] and susceptibility to discomfort glare [51], to name just a few -that could impact upon visual performance in the presence of glare. Furthermore, it would be of great interest to investigate the extent to which the relationship is affected by pathological conditions that are associated with increased scatter, such as cataracts [18,52], corneal dystrophy [37], keratoconus [53] and retinitis pigmentosa [54], as well as the potential effects of contact lens wear [55,56] and refractive surgery [57][58][59]. Expanding the sample upon which the contrast threshold curve is based has the potential to improve the accuracy of the predictions, possibly by tailoring the formulae to specific age groups.…”