Glossary
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Lacrimal gland
A gland that produces tears.
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Lasik
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.
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Lathe cutting
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.
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Lens
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.
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Lens deposits
See Deposits.
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Lens intolerance
Discomfort during contact lens wear; can involve foreign body sensation, light sensitivity, blurred vision; often due to overwear of contact lenses, especially PMMA lenses.
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Lens vial
Small glass container in which many types of soft contact lenses are shipped.
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Light transmission
The amount of incident light transmitted through a contact lens material; also known as transparency.
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Limbus
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.
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Low vision
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).
