Light Sensitivity

Poor night vision or night blindness can be a life-limiting symptom. Night blindness can be caused by either an inherited or acquired reason. Poor night vision disorders (night blindness, impaired dark adaptation, etc.) include the experience of reduced vision in dimly lit environments, including at night. They include partial or complete impairment in ability of the eyes to adapt from brightness to darkness. It is not a disease in itself, but rather a symptom of an underlying problem, usually located in the retina.
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Photophobia literally means “fear of light,” but it just means that you are overly sensitive to light.  Light sensitivity might be temporary, but it can be an indicator or symptom of another problem.

People with photophobia experience pain, tearing, and sometimes headaches especially when they are out in bright light too long.  A common summer example is too much light from the sun plus reflection off water when we are out in a boat.  You just want to close your eye from so much light, and later in the day or evening you may have a headache.
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The eyes are small, but they have many parts including the eyelids, sclera, cornea, lens, optic nerve and retina. We depend heavily on our vision. When something goes wrong, the eyes are disproportionately affected. For example, a senior at risk of heart disease is also at risk of an ocular arterial or vein occlusion. Also, the macula requires a yellow-colored nutrient (lutein and zeaxanthin) found in certain vegetables such as green leafy vegetables, red, yellow and green peppers, corn and eggs. And antioxidants found in fresh fruits and vegetables have been shown to reduce oxidative eye damage and eye disease.
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Corneal abrasions are scratches on the outermost part of the eye. Sometimes a painful injury is the clear cause. Other times, symptoms can build slowly over a few hours. A corneal abrasion causes so much discomfort that sufferers should seek medical care quickly. The scratch can become infected and cause serious damage in as little as 24 hours. Therefore, recognizing a corneal abrasion could save your sight.

The cornea has 6 layers, and it is very sensitive. It helps the body regulate tear production. The cornea sends signals to the brain to direct it to tell the lacrimal glands whether more or less tears are needed every moment.
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When eye injuries occur, eye first aid can prevent blindness and vision loss. Eye injuries can be inconsequential or life-changing. Know what to do with each type of eye injury. Also learn how to prevent injuries to the eyes. Most eye injuries can be prevented with protective eyewear. You should keep certain items on-hand in case of eye injuries.

Exposure to Chemicals

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Everyone is sensitive to light to some degree, but light sensitivity, or photophobia is an abnormal intolerance for light. Discomfort can be experienced from light sources such as sunlight and fluorescent or other artificial lights. It may cause the person with light sensitivity to squint or to have to close their eyes. It can cause pain and/or tears. In some cases, this may be accompanied by a headache.

The brighter the light, the greater the discomfort. Generally people
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Sjogren’s syndrome is an autoimmune disorder of the rheumatoid type. Rheumatoid type diseases are characterized by inflammation and pain, dry eyes and a dry mouth. There are two types. In Primary Sjogren’s syndrome, the disorder occurs without the presence of an accompanying autoimmune disorder. In Secondary Sjogren’s syndrome, it occurs in conjunction with another autoimmune disorder.

In autoimmune disease, the body’s immune system mistakes some of its own cells as foreign invaders and attacks
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