M

Meibomian secretions - Oily secretions from the eyelid glands that supply the outer portion of tear film, prevent rapid tear evaporation and tear overflow.

Micron - One thousandth of a millimeter.

Microkeratome - The instrument a surgeon uses to create the corneal flap in the uppermost layer of the cornea during the LASIK procedure.

Monovision - The purposeful adjustment of one eye for near vision and the other for distance vision accomplished with either corrective lenses or surgery.

Myopes - People who are nearsighted.

Myopia - The medical term for nearsightedness. Eye is too steep, too long, image is focused in front of the retina.

Multifocal - Type of spectacle or contact lens design that includes more than one focal area, such as bifocals or trifocals.

Munsons sign - Protrusion of the lower lid on down gaze.

N

Nearsightedness - See "Myopia"

Nebulas - Scars that are translucent.

Neovascularization - An Abnormal growth of new blood vessels, such as in an excessive amount, or in tissue that normally does not contain them, or of a different kind than is usual in that tissue

Nomogram - A surgeon's adjustment to the laser's computer calculation to further refine his or her own results.