A gland that produces tears.
Stands for laser-assisted in situ keratomileusis. LASIK is a refractive laser eye surgery for correcting near and far sightedness and astigmatism and reduce dependency on glasses or contact lenses.
Contact lens manufacturing method in which dry buttons of the lens material are cut with lathes; most labor intensive and least reproducible method of contact lens manufacture, but useful for production of small quantities or custom parameters.
The lens is a transparent body behind the iris, the coloured part of the eye. The lens bends light rays so that they form a clear image at the back of the eye - on the retina. As the lens is elastic, it can change shape, getting fatter to focus close objects and thinner for distant objects.
Discomfort during contact lens wear; can involve foreign body sensation, light sensitivity, blurred vision; often due to overwear of contact lenses, especially PMMA lenses.
Small glass container in which many types of soft contact lenses are shipped.
The amount of incident light transmitted through a contact lens material; also known as transparency.
Anatomical location where the cornea and sclera meet; contains many blood vessels and is a critical area in contact lens fitting for indicating the success of a fit.
Impaired vision with a significant reduction in visual function which is not fully correctable with conventional vision correction devices (i.e., spectacles or contact lenses).