Nystagmus is a relatively common clinical condition that remains a therapeutic enigma. We present a case in which soft contact lenses were prescribed in a young adult with congenital jerk nystagmus. Immediate and large improvements in both motor and sensory function, as well as cosmesis, were found, with enhancement one week later following constant lens wear. Use of soft contact lenses in thes...

background: free-living amoebae (fla) including acanthamoeba spp. and hartmannella spp. are the causative agents of serious corneal infection especially within contact lens wearers. thus contact lenses and their storage case could be a suitable niche for potentially pathogenic amoebae. the main objective of the present study was to evaluate the contamination of contact lenses to free living amo...

PURPOSE Many soft contact lens wearers have symptoms or signs that compromise successful lens wear. This study estimated the prevalence of problems in current wearers of soft contact lenses and tested the effect of refitting patients with senofilcon A silicone hydrogel lenses (ACUVUE Oasys). METHODS Prevalence was estimated from 1,092 current lens wearers for frequent or constant discomfort o...

Customized contact lenses are limited in their correction performance, especially on irregular corneas, owing to decentration and rotation of the lenses. To overcome this limitation, we proposed to customize the back surface of soft contact lenses to match the anterior irregular corneal surface. These lenses were designed to correct anterior corneal aberrations and to improve lens stability. Al...

PURPOSE To assess the validity and repeatability of objective compared to subjective contact lens fit analysis. METHODS Thirty-five subjects (aged 22.0±3.0 years) wore two different soft contact lens designs. Four lens fit variables: centration, horizontal lag, post-blink movement in up-gaze and push-up recovery speed were assessed subjectively (four observers) and objectively from slit-lamp ...

One of the most important optical signal processing operations is the optical Fourier transform (OFT). Of the arrangements for implementation of the OFT, perhaps the most flexible is that for the scaled optical Fourier transform (SOFT), as it allows control over the scale of the output Fourier transform distribution. By means of an analysis in cylindrical coordinates, we examine some of the pra...

Cross-linking of corneal collagen (CXL) is a promising approach for the treatment of keratoconus and secondary ectasia. Several long-term and short-term complications of CXL have been studied and documented. The possibility of a secondary infection after the procedure exists because the patient is subjected to epithelial debridement and the application of a soft contact lens. Formation of tempo...

UNLABELLED A 56-year-old woman with a history of disposable soft contact lens wear was referred to our university eye center for a corneal ulcer. Based on the microbial culture, the initial diagnosis was bacterial keratitis, which was unresponsive to topical fortified antibiotics. The patient was then examined using in vivo confocal microscopy, which revealed Acanthamoeba infection. This case e...

The oxygen tension in the aqueous humor in the anterior chamber of rabbit eyes was measured continuously with a polarographic electrode. The normal oxygen tension in the anterior chamber was 23 +/- 2 mm Hg (mean +/- SD, n = 4). A contact lens was then placed on the cornea for at least 10 min and the drop in oxygen tension recorded. A hard polymethylmethacrylate lens reduced the oxygen tension b...