Normal pH of tears is:
Correct Answer: 7
Description: Tear film consists of - Innermost mucinous layer lining the conjunctival cells and corneal epithelium secreted by the goblet cells,Middle aqueous layer secreted by the lacrimal and accessory conjunctival glands of Krause. Outermost superficial lipid layer secreted by the meibomian glands which are veically oriented sebaceous glands found within the tarsal plate and limits the evaporation of tears. physical chracterstics of tear film- Ph=6.5 to 7.6; the mean value was 7.0. Refractive index= 1.375 basal rate of production-1.2ul/min
Category:
Ophthalmology
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