Eye & contact lens
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Clinical Trial Controlled Clinical Trial
Empirical versus trial set fitting systems for accelerated orthokeratology.
To compare the short-term clinical performance of two reverse-geometry rigid contact lens systems for accelerated orthokeratology with different fitting approaches and designs: an experimental lens that was fitted empirically (No. 7 Contact Lens Laboratory, Ltd.) and a more established lens using a trial set system, the BE lens (NKL). ⋯ Both lens types investigated in this study were effective in temporarily reducing myopia and in providing good unaided visual acuity during the day (without lenses) in subjects with low levels of myopia. Subjective reaction showed that the lenses were perceived as being equally effective, but clinical data showed that the BE lens effected more myopic reduction and better unaided visual acuity than did the No. 7 lens during the 7-day period investigated.
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To describe the first case of ocular surface injury resulting in a pseudopterygium from a microwave superheated egg. ⋯ Microwave superheated eggs can result in ocular injury. This case illustrates the potential ocular danger involved with microwave ovens.
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Randomized Controlled Trial Clinical Trial
The comparison of overnight lens modalities (COLM) study.
The Comparison of Overnight Lens Modalities (COLM) Study is a controlled, randomized, clinical pilot study to determine the sample size required to perform a multicenter clinical trial comparing Paragon CRT lenses with CIBA Vision Focus NIGHT and DAY 30-day continuous-wear silicone hydrogel lenses. ⋯ The NEI RQL-42 may be able to detect differences in refractive quality of life between two contact lens treatment groups for the dependence-on-correction scale. Paragon CRT and CIBA Vision Focus NIGHT and DAY lenses produced similar high- and low-contrast visual acuity in this study. A sample size of 126 subjects per group is required to find a 10-unit difference on the NEI RQL-42.
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Randomized Controlled Trial Clinical Trial
Overnight corneal reshaping versus soft daily wear: a visual quality of life study (interim results).
To evaluate patients' perceptions of visual quality of life differences in a crossover study with two different modes of contact lens wear: overnight corneal reshaping (OCR) lenses and daily-wear soft lenses. ⋯ Although overall satisfaction scores and vision were comparable between the two modes, 71% of the subjects elected to stay with CRT lenses. In this study of patients who experienced both modes of lens wear, 71% chose OCR lenses.
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To report an uncommon case of bilateral spontaneous corneal perforation in keratoconus. ⋯ Special attention should be paid to the possibility of spontaneous corneal perforation during acute hydrops in patients with severe corneal thinning, biomicroscopic findings of advanced disease, and high keratometry readings.