Night Vision and Thermal Systems

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Common culprits behind poor night vision

The ability to see in the dark may come naturally for most humans, but there are some who actually suffer from poor night vision – sometimes through no fault of their own, but oftentimes through unhealthy treatment of the eyes.

One obvious reasons of poor eyesight and, therefore, poor night vision – is the lack of ample vitamin A in the diet. Foods that are rich in vitamin A include: organ meats, carrots, pumpkin, sweet potato, squash, apricots, butter and cheese, among others. These foods should be included in one’s diet in order to prevent a deficiency in vitamin A, which could eventually lead to night blindness.

A deficiency in vitamin A is not the only reason behind a poor night vision. Apparently, neglecting zinc in your diet can cause the eyesight to gradually deteriorate as well. Zinc food sources include beans, nuts, poultry and beef. This mineral works hand in hand with vitamin A in improving and maintaining a healthy eyesight.

Human Eye Diagram

Human Eye Diagram

Another possible reason behind a poor night vision is insufficient exposure to natural light. Sunlight is good for the eyes, except when one looks directly at it which is obviously very unhealthy. Natural morning light courtesy of the sun provides enough stimulation to the retina of the eyes, consequently increasing its ability to tolerate different levels of light. Once in a while, leave the sunglasses at home and bask in the natural glow of the sun to help keep your eyes healthy the natural way.

There are also a couple of medical conditions that may cause poor night vision:

Night Myopia. A person with this disorder sees normally enough during the day, but has a great deal of trouble seeing from a distance at night. This may be due to a short sightedness that has not been corrected and managed immediately. This is a treatable condition that should be consulted as soon as possible with an eye doctor to prevent further damage to the eyes.

Cataracts. The first sign of a gradually progressing cataract is poor vision at night, branching to seeing halos around lights and blurred vision. Cataracts are accumulation of debris from cell turnovers within eye lenses. This condition can be treated by surgery.

Retinitis Pigmentosa. This is a rare, hereditary disease of the eyes—serious and untreatable at the moment. This is characterized by slow, degeneration of the retina leading to vision at night and complete loss of peripheral vision.

Diabetes. Having high levels of sugar in the blood can become toxic to the blood vessels and nerves of the eyes. When not managed properly, this illness can cause gradual damage to the retina known as retinopathy, which is characterized by poor vision at night.

Complications from laser eye surgeries can also possibly cause poor night vision such as seeing a glare or halo around objects in the dark, or seeing blurred images even in broad daylight. That is why it is important to consider one’s chances of complications before considering getting a laser eye surgery treatment.







Categorised as: Night Vision


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