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PubMed1988

Preoperative prediction of postoperative visual acuity in patients with cataracts: a quantitative review.

Many tests of visual function have been proposed as means of preoperatively evaluating cataract patients' surgical outcomes. It is impractical to compare all of these tests simultaneously on the same group of patients. Quantitative reviews apply quantitative methods to comparisons across studies. We compared the results of 52 reports in which cataract patients' postoperative acuity was predicted by means of visually evoked potential, laser interferometry, or projection tests (potential acuity meters-pinhole). The results of each study were summarized in a 2 x 2 contingency table. Summary statistics were compared by means of analysis of variance and post hoc tests. Despite difficulties in metaanalysis, we found the visually evoked potential a better predictor with dense opacities. We recommend standardization in a quest for more precise predictions of postoperative visual acuity.

Cataract Extraction↗
PubMed1989

[Long-term follow-up of deterioration of the visual field in visual acuity in retinitis pigmentosa].

The first part of this presentation is devoted to the problem of determining the precise time of onset of retinitis pigmentosa (RP). For the purpose of this discussion we will stay with the definition of the beginning of RP as that date on which the decrease in dark adaptation is first noticed, rather than visual field loss, which is subject to even greater uncertainty. The cases selected demonstrate that the period between the first sign of night-blindness and a noticeable narrowing of the visual field can vary greatly. A latent period of slow progress is followed by marked decrease in visual function. In a third period the area loss proceeds linearly. The course of the disease was observed over periods of up to 16 years using the Goldmann perimeter. Several stages of visual field deterioration are presented over periods of up to 65 years. The mode of visual field loss depends on the diameter of the test objects employed.

Adult↗