Decorative and special-effect contact lenses, like contact lenses intended for correcting vision, present serious risks to eye health if they are distributed without the appropriate involvement of a qualified eyecare professional.
Vision Glossary by Letter
Presbyopia- The inability to maintain a clear image (focus) as objects are moved closer. Presbyopia is due to reduced elasticity of the lens with increasing age.
PRK- The acronym for photorefractive keratectomy which is a procedure involving the removal of the surface layer of the cornea (epithelium) by gentle scraping and use of a computer-controlled excimer laser to reshape the stroma.
Pupil- A hole in the center of the iris that changes size in response to changes in lighting. It gets larger in dim lighting conditions and gets smaller in brighter lighting conditions.
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