Effect of 30-Day Continuous Wear of Silicone Hydrogel Contact Lenses on Corneal Thickness

Abstract

All patients maintained their visual acuity. Apart from the limbal vascularization and punctate epithelial corneal defects, which resolved when the contact lens was removed for 1 day, no serious complications were noted. Despite the high oxygen permeability of the monthly Night & Day contact lenses, the mean central and peripheral corneal thicknesses increased. These increases indicate that these lenses may have an effect on corneal metabolism.

Impression Cytology of Tarsal Conjunctiva in Long-Standing Ocular Prosthesis Wearers: Case Reports

“…GPC was first reported as an allergic reaction affecting the upper tarsal conjunctiva in patients wearing contact lenses [11]. The condition can be seen with all types of contact lenses including silicone hydrogels [12]. According to Donshik [13], GPC is more common in reusable soft contact lens (85%) than RGP wearers (15%) and may develop after years of successful contact lens wear.…”

Corneal warpage

“…Various authors failed to observe corneal curvature changes in patients wearing low [19][20][21] and high 19,20 modulus silicone hydrogel lenses during observation periods ranging from 1 to 18 months.…”

Ocular Surface Health during 30-Day Continuous Wear: Rigid Gas-Permeable versus Silicone Hydrogel Hyper-O2Transmitted Contact Lenses

“…2,3 Although hypoxia has been significantly reduced with the advent of hyper-O 2 transmitting lenses, contact lens-induced complications have not been completely eradicated (Levy B, et al IOVS 2000;41:ARVO Abstract 387). 6,7 Consequently, the focus of contact lens research has shifted from studying the effects of hypoxia on corneal physiology to investigating and improving the biocompatibility between the contact lens and the ocular surface.…”