Eye & contact lens
-
To examine the effects of soft contact lenses on tear breakup time (TBUT), basal Schirmer test result, and the conjunctival surface in patients wearing contact lenses. ⋯ We suggest that TBUT and Schirmer test result be carefully monitored in contact lens wearers. Impression cytology may be used as a safe, simple, and noninvasive method in the diagnosis of ocular surface alternations in patients with contact lens intolerance.
-
Case Reports
Pseudomonas keratitis associated with continuous wear silicone-hydrogel soft contact lens: a case report.
To report a case of Pseudomonas aeruginosa culture-positive microbial keratitis in a patient wearing continuous-wear silicone hydrogel soft contact lenses. ⋯ The recently introduced continuous-wear silicone hydrogel soft contact lenses, with their hyper oxygen permeability (Dk), have been shown to overcome hypoxia-associated complications and to have less P. aeruginosa binding to the corneal epithelium. Our case shows that sight-threatening microbial keratitis can still occur even with silicone hydrogel soft contact lenses. Contact lens practitioners should educate patients on the risk of sight-threatening microbial keratitis, the need for patient compliance, and prompt assessment of contact lens-related complaints.
-
Multicenter Study Comparative Study Clinical Trial Controlled Clinical Trial
Corneal endothelial morphology results in the Menicon Z 30-day continuous-wear contact lens clinical trial.
This evaluation was conducted as part of a protocol entitled Evaluation of the Menicon Z Rigid Gas Permeable Contact Lens for up to 30 Days Extended Wear. The purpose of the protocol was to compare corneal endothelial morphology changes after wearing rigid gas-permeable (RGP) Menicon Z contact lenses, continuously for up to 30 days, with ACUVUE (Johnson & Johnson Vision Care) hydrogel contact lenses, worn for up to 6 nights of extended wear. ⋯ The Menicon Z lens wearers in this study did not show significant endothelial cell morphology changes after 1 year of nearly continuous contact lens wear. This finding is particularly important considering the RGP wearers in this study were older by a average of 10 years (mean age approximately 40) and had worn their contact lenses an average of almost 10 years longer than the soft contact lens wearers.