Overnight Orthokeratology

Abstract

Overnight orthokeratology is an effective means of temporarily reducing myopia. The possible mechanism of corneal remodeling through central corneal thinning is discussed.

Influence of induced decentered orthokeratology lens on ocular higher-order wavefront aberrations and contrast sensitivity function

“…1,2,4,8 In recent years, the procedure has gained acceptance by practitioners and patients as a treatment for the correction of myopia and will likely become a popular alternative to spectacles, daily-wear contact lenses, or corneal refractive surgery, especially in the case of low to moderate myopia.…”

Orthokeratology-Associated Infectious Keratitis in a Tertiary Care Eye Hospital in Hong Kong

“…1 Reverse-geometry gas-permeable contact lenses that have a base curve flatter than the central corneal curvature and a secondary curve steeper than the base curve radius, induce central corneal flattening for correction of myopia. 2 With availability of lens materials with higher oxygen transmissibility, overnight orthokeratology allows patient to achieve an improved unaided vision during daytime. Hong Kong has one of the highest prevalence rates of myopia with 61.5% myopic children by the age of 12 years.…”

Acanthamoeba keratitis related to orthokeratology

“…Their base curve is usually flatter than the anterior corneal curvature. Thus, changes in the cornea, including corneal epithelial edema, abrasion, and staining, can occur and predispose the central cornea to an increased risk of infection [3]. Besides lens design, the night-wearing strategy of orthokeratology lenses may be another important risk factor of infection.…”

“…These reverse-geometry, rigid, gas-permeable (RGP) contact lenses are worn overnight, allowing the patient to achieve improved uncorrected visual acuity during the day [2]. Although the advent of reverse-geometry contact lens design and new RGP materials with high oxygen transmissibility have contributed to increased stability and safer effect, disturbances in the structure and physiology of the cornea and overnight wearing are known to be risk factors for infectious keratitis [3][4][5]. Here, we report four patients with Acanthamoeba keratitis in Korea associated with overnight orthokeratology over three recent years.…”