Tear Drop
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It Is Advised To Watch Out For Ophthalmocace Supposed You Have Too Much Tears
Why we often weep: in normal state, every time after a person blink, tear oozed by tear gland and minor tear gland reaches balance through tear excretory system or tear evaporation. The lacrimal fluid covers the whole optical surface of the eyeballs so that they can be maintained moist and comforable, and meanwhile, we can't feel tear drops. But if the tears are too many or there is something wrong with defecation system, we will feel that we are crying. Too many tears may result from multiple factors, including nerve stimulus.
Reflex stimulation caused by foreign matters, the effects of cholinergic and anticholinesterase medicine and some eye diseases, like glaucoma, blepharitis, conjunctivitis, iritis and so on. Or the stimulation of the trigeminal nerve and facial nerve. The excessive tear secretion will not be evaporated or discharged timely which will result in more tears.
And there are something wrong with your excretory system of your tears. It often include abnormal position, stenosis or astresia of puncta, stenosis and choke from puncta to nasolacrimal canals. Or dysfunction of lacrimal ducts, etc. All these will lead t This case is often seen on the elderly. They frequently weep against the wind and the symptons deteriorate in cold climate, regardless of seasons, indoors or outdoors.
Snow blindness, also called snow ray ophthalmia, is mainly caused by ultraviolet radiation in the sun light, and it will hurt your cornea if it is reflected from the vast snow ground to your ocular region. Studies optical eyeglasses have shown that the sun's ultraviolet radiation of 300 micron shines into the snow. If eyes were hitted by the reflected light, snow blindness could occur. There are photophobia, tears, swelling pain, itching and intraocular foreign body sensation and other symptoms. Therefore, when go out on the snow days, you had best wear sunglasses to prevent snow ground reflecting strong light from stimulating the eyes.
chronic conjunctivitis: in autumn and winter, chronic conjunctivitis is the main cause for regular lachrymation, and it can be divided into two categories: infectious and non-infectious. The former is caused by inflammation of pathogenic microorganisms. Bacteria, viruses, chlamydia, fungi, etc. are likely to be pathogenic. The occurrence of Non-infectious chronic conjunctivitis is mainly related to environment and the habbit to use eyes, and its prevalence rate is increasing day after day. The stimulation of the sand, dust, smoke and harmful gas and often stay up late, lack of sleep, too much smoking, eye fatigue, which will lead to chronic conjunctivitis.
Dry eye syndrome, sears optical glasses optical also will cause eldly people tearing. The cold and dry winter is high season of dryness of eyes. Lipid tear deficiency makes the basic emmition of tears become less and, eyes dry and uncomfortable. If the surface of eyeballs is damaged, a lot of tears will flow out of eyes refletively. Menopausal women, allergic conjunctivitis patients, people who contracted trachoma at the early age, people who have corneal scarring organization are susceptible to dry eye to lead to flowing tears. The nasolacrimal duct blockage: Many elderly people who are often in tears is due to blockage caused by nasal lacrimal duct. The opening of nasolacrimal duct is at the position of the the lower eyelids which is near the nose while the exit is in the nasal
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