Dry Eye Literature Review

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. Literatures review Previous studies have suggested that dry eye is often characterized by increased tear evaporation due to poor tear film quality especially of the lipid component of the tear film. Several studies have demonstrated that dry eye disease, a complex group of conditions, is characterized by a dysfunction of one or more of the components of the tear film, and in 60% or more of patients there is the condition of evaporative dry eye .321 Studies have shown that such environments cause an increased rate of evaporation of the ocular surface tear film in both dry eye6 and normal subjects. 32 Previous studies have found that the Vapometer is a self-contained, battery powered instrument. It is equipped with a push button, a small…show more content…
Most previous evaporimeters have considered the area of the exposed ocular surface while reporting their tear evaporation rate. 37 Studies have shown that since the measurement area is enclosed during the measurement period, evaporation rate is unaffected by ambient airflow .37 Previous Study population Fifteen participants (7 men, 8 women) with a mean age of 25.9 _ 4.4 years, with healthy eyes and no exposure to previous contact lens wear were recruited. The sample size of fifteen participants was calculated to determine a significant difference of 36 g m _2 h between repeat measurements at the 5% level of significance corrected for multiple comparisons and with 80% power .37 Studies have shown that all participants signed written informed consent before commencing the study .37 Studies have shown that control the total volume enclosed by the goggles, of each individual was also determined, as the rate of evaporation is significantly influenced by the enclosed volume…show more content…
Not only evaporative dry eye but also aqueous deficient dry eye patients may have increased tear evaporation.3 Several studies have investigated the effects of lid warming treatment in tear evaporation rate and shown that Conjunctival TE rates can be effectively reduced by lid warming treatment in some MGD patients 4 More recent attention has focused on the provision of tear evaporation rate and if it is effected by age or gender and found that people who are over 45 years old have higher tear evaporation rate than younger people and women have higher TER than

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