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眼睛干涩、发痒、畏光和有异物感是老年人经常出现的症状。这些症状常会严重影响老年人的日常生活。那么,哪些原因会引起老年人的眼睛干涩呢? 1 泪腺的分泌功能减退泪腺位于眼眶外上方的泪腺窝内,其所分泌的泪液可通过眨眼运动涂抹于眼球表面,形成一层泪液膜。这层泪液膜具有保持眼球表面湿润和平滑的作用。泪液中除了含有水分外,还含有黏液等其他成分,故可以在眼球表面保留较长的时间。人到40岁左右时,泪腺的分泌功能开始退化。一些老年人泪腺的分泌功能减退得较为明显,就出现了眼睛干涩、灼痛和发痒等干眼症
Eyes dry, itchy, photophobia and foreign body sensation is a common symptom of the elderly. These symptoms often have a serious impact on the daily lives of the elderly. So, what causes the elderly dry eyes do? 1 secretion of lacrimal gland loss of lacrimal gland is located above the orbital outside of the lacrimal fossa, the secretion of tears through the blinking of the eye can be applied to the eye surface, the formation of a layer of tear film. This tear film has the effect of keeping the surface of the eye moist and smooth. In addition to tears in addition to water, but also contains other ingredients such as mucus, it can be retained in the eye surface longer time. When people are about 40 years old, the secretory function of the lacrimal gland begins to degenerate. Some elderly lacrimal gland secretion decreased more obvious, there appeared dry eyes, burning and itching and other dry eye