undercorrection

undercorrection

(ŭn″dĕr-kŏ-rĕk′shŭn)
In refractive eye surgeries such as LASIK, too small a change in shape of the cornea that results in inadequate focusing of light rays (failure of light to fall onto the retina).

undercorrection 

A term applied to a corrective lens prescription of slightly lower power than required. It has been prescribed in an unsuccessful attempt to slow the progression of myopia in children because it reduces the accommodative stimulus. See myopic defocus; myopia control.
References in periodicals archive ?
Undercorrection of myopia with single vision spectacles was once thought to be an ideal strategy for myopia control as it reduced accommodative lag, which has been associated with myopia and its progression.
Any amount of overcorrection or undercorrection were measured by alternate prism bar cover test.
Surgeon satisfaction was also better in SRG than FLG as the procedure was easy, less time consuming, and easily adjustable in case of undercorrection or overcorrection when compared with FLG.
Likewise, proper planning can avoid undercorrection.
Why does undercorrection not reduce its progression?
Koo NK, Lee YC, Lee SY Clinical study for the undercorrection factor in intermittent exotropia.
Some of the risks of poorly performed LASIK surgery include blindness, severe infection, significant undercorrection, significant overcorrection, severe dry eyes, impaired night vision, double vision, and seeing “halos” and “starbursts.
The use of the Bazett formula results in an overcorrection of the QT interval at higher heart rates and undercorrection at lower heart rates.
These included development of exposure keratopathy due to dryness of eyes in both eyes of one patient, overcorrection in one eye of a patient and undercorrection with hypotropia in one eye of another patient.
Despite all precautions, one may end up with overcorrection or undercorrection.
A 2008 American Journal of Ophthalmology report found that 28% of eyes treated with Lasik required additional surgeries less than ten years after the initial surgery due to undercorrection, overcorrection, or regression.