subject: It Is Advised To Be Alert To Eye Diseases In Case You Have Too Much Tears [print this page] Why people often shed tears: under normal circumstances, after each blink eyes, the tear secreted by lacrimal gland and deputy lacrimal gland will balance by the excretory system of tear or evaporation. The whole eyeglasses eyeball surface is covered by tears to protect its wet and comfort, and help us to ignore crying. When lacrimal glands secreted too much or there's something wrong with its excretory system so that we would feel our tears. Many factors would lead us secrete too much tears, including our mental stimulation.
Foreign body's reflex stimulation; cholinergic drugs and anti-cholinesterase agents of drug effect; certain eye diseases such as glaucoma, eyelids, conjunctiva, iritis and so on. Or the trigeminal nerve, facial nerve being stimulated. Excessive tear secretion. No time to evaporation or discharge will result in incessant tears.Or the trigeminal nerve, facial nerve being stimulated. Excessive tear secretion. No time to evaporation o
The failures of the tear-excretory system usually include that lacrimal point position is abnormal, narrow, or atresia, lachrymal canal and tear duct are long and narrow or blocked, lacrimal functions are incomplete,which lead to tears that can not be dis Old people usually get such symptom, they will cry when in thr front of the wind and get worse under cold weather, even no matter which season and in or out of house.
Snow blindness: it is also known as snow ophthalmia, mainly because the strong ultraviolet rays in sunlight are reflected by snow field to the eye cornea of people, leading to corneal trauma. The investigation sunglasses shows that 300 micron medium-wave ultraviolet radiation which contians in the sunshine, when they irradiated on the snow field, we may cause snow blindness by reflected sunlight to our eyes. Symptoms such as photophobia, tearing, pain, swelling, itching and the feeling of foreign matter in eyes appears. It is better to wear sunglasses when going out in heavy snow in order to protect your eyes against strong light reflected by snow.
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 an inflammation caused by pathogenic microorganism. And bacterium, viruses, chlamydia, fungus may all cause diseases. The occurrence of non-infectious chronic conjunctivitis mainly is connected with environment and the habits of using eyes, its prevalence is increasing. Being stimulated by sand, dust, smoke, or harmful gas and frequetly staying up late, lack of sleep, smoke too much, with eyes fatigue lead to chronic conjunctivitis
Xeroma: dry eyes men sunglasses results in lachrymation of the elderly. The dry and frigid winter has higher frequency of coming down with xeroma. Xeroma will reduce the secretion of basic lacrimal, making you feel dry and afflictive in the eyes. If the surface of the eyeballs subject to bruises, the eyes will weep intensively as a result of reflection. Change-of-life women, allergic conjunctivitis patients, the ones with air bubble history when they are young, the ones whose corneas with scar tissues will easily cry due to their dry eyes. Nasolarcrimal duct nasal congestion, many old people often tears caused by nasolarcrimal blockage. The opening of nasolarcrimal duct is close to the lower eyelid, and the exit is in the nasal cavity.
It Is Advised To Be Alert To Eye Diseases In Case You Have Too Much Tears
