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- W1999960942 abstract "Purpose: To investigate the relationship between age, stability of the precorneal tear film and refractive index of tear samples drawn from a normal population. Methods: The stability of the precorneal tear film was estimated by measuring the Tear Thinning Time MT) using the Bausch and Lomb keratometer. Microlitre tear samples were obtained from the lower tear meniscus using glass capillary tubes. The refractive index (RI) was measured using a digital electronic Abbe refractometer with an accuracy of ± 0.00005 units. Measurements were obtained from the right eyes of 110 subjects (55 male and 55 female) ranging in age from 18 to 89 years. They were all healthy, non-contact lens wearing individuals with no history of ocular disease or dry eye symptoms. Results: A significant relationship was found between age (x) and tear stability (TTT) in both genders. Females, TTT=32.89−0.33x, (Spearman correlation coefficient, r=−0.537, P=0.0001). Males, TTT=29.25−0.29x (Spearman correlation coefficient, r=−0.353, P=0.008). A significant correlation was found between age (x) and refractive index (RI) in females only RI=1.33815−0.000023x, (Spearman correlation coefficient, r=−0.299, P=0.027). Conclusion: Tear stability is lower in the aged eye regardless of gender. Tear refractive index is lower in the older female eye." @default.
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- W1999960942 date "2000-01-01" @default.
- W1999960942 modified "2023-09-27" @default.
- W1999960942 title "Age, stability of the precorneal tear film and the refractive index of tears" @default.
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- W1999960942 doi "https://doi.org/10.1016/s1367-0484(00)80024-7" @default.
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