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The effects of extended contact lens wear on the cornea have been studied extensively and are well-documented. When determining the effects of long-term contact lens use on the cornea, many studies do not differentiate between users of hard and soft contact lenses, while studies that have made this differentiation have found similar results.
Orthokeratology is the use of gas-permeable contact lenses that temporarily reshape the cornea to reduce refractive errors such as myopia, hyperopia, and astigmatism. Learn about the history, mechanism, use, risks, and research of orthokeratology from this Wikipedia article.
Contact lenses are thin lenses placed directly on the surface of the eyes for vision correction or cosmetic reasons. Learn about the origins, development and classification of contact lenses from this comprehensive Wikipedia article.
Learn about the different types of corrective lenses, such as glasses, contact lenses, and intraocular lenses, and how they are prescribed by eye care professionals. Find out how they improve visual perception and treat refractive errors, and the advantages and disadvantages of over-the-counter and self-selected lenses.
You can get an amoeba just from showering with your contacts, or sitting in a hot tub. Though the infection is rare, it can be life or vision-threatening. Scary reason you should never wash ...
Astigmatism is a refractive error that causes blurred or distorted vision due to an irregular curvature of the eye. Learn about the types, causes, diagnosis, and ...
Astigmatism is a type of optical aberration where rays from different planes have different foci. Learn about the forms, causes, and corrections of astigmatism in optical systems and vision science.
Refractive error, also called ametropia, is a problem with focusing light on the retina due to the shape of the eye and/or cornea. Learn about the common types (nearsightedness, farsightedness, astigmatism, presbyopia), causes, diagnosis, and treatment options.