The lens is able to change shape allowing the eye to focus at different distances. Microkeratome is a surgical device that is affixed to the eye by use of a vacuum ring. When secured, a very sharp blade shaves a small amount of the cornea at a predetermined depth. Monovision is the purposeful adjustment of one eye for near vision and the other eye for distance vision. Myopia the inability to see distant objects clearly.
Nearsightedness is the common term for myopia.
Ophthalmologist is a medical doctor specializing in the diagnosis and medical or surgical treatment of visual disorders and eye disease. Optician is an expert in the art and science of making and fitting glasses and may also dispense contact lenses. Optometrist is a primary eye care provider who diagnoses and manages disorders of the visual system and eye disease. Overcorrection is a complication of refractive surgery where the expected amount of correction is more than desired and often occurs where healing regresses less vigorously than predicted. Presbyopia is part of the normal process of aging.