الفهرس 
Epidemiology of Dry Eye in LASIK PatientsOnly 14 pages are availabe for public view
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Abstract
Dry eye has been reported as sequelae of LASIK. Quality and
quantity of tear film are considered valuable parameters for the
diagnosis of dry eye disease.
Anterior segment optical coherence tomography (AS-OCT)
have been introduced to evaluate tear film parameters, It is considered
a noninvasive approach to produce a tear meniscus image and a
potential tool to diagnose dry eye after LASIK.
This prospective study was performed by Anterior segment
OCT system (RTVue-100; Optovue Inc., Fremont, CA, USA) on 50
subjects who undergo LASIK procedure for evaluation of tear menisci
parameters. These subjects were further divided into two groups, first
group was (25 subjects) with supplementation of Omega-3 fatty acids
for 1 week pre-operative and continued for a month post-operative,
the age of this studied patient with omega 3 administration ranged
from 19 to 45 years old, 80% of the studied groups were female and
20% were male and a second group (25 subject) without Omega-3
supplement , the age of this studied patient ranged from 19 to 48 years
old, About 2/3 (60%) of the studied group were female and 40% were
male.
Examination by Anterior segment OCT done to measure Tear
Meniscus Height (TMH), Tear Meniscus Depth (TMD), and Tear
Meniscus Area (TMA) before and after LASIK for all cases with
follow up 1’st day, 1’st week and 1’st month for the evaluation of
Upper and Lower Tear Menisci values.
This study has found that Upper and lower Tear Meniscus
parameters higher in omega 3 treated group than control group at Pre -
operative to 1 day, 1 week and 1-month Post-operative. In general, the
Upper tear meniscus parameters were statistically lower than lower
Tear Meniscus parameters. It was also shown that the upper and lower
tear menisci were decreased up to 1 month after LASIK. By
comparison these results with anther studies found that these results
are consistent with the others.
finally, Optical coherence tomography is a useful tool for
evaluating of the tear film in patients with LASIK. Omega-3 FA
supplementation improves dry eye post LASIK symptoms, tear film
stability, and tear production.