Vision Eye Care and Blindness

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The visual system is the part of the central nervous system which enables organisms to process visual detail, as well as enabling several non-image forming photoresponse functions. Visual perception is the ability to interpret information and surroundings from the effects of visible light reaching the eye. The resulting perception is also known as eyesight, sight, or vision. The various physiological components involved in vision are referred to collectively as the visual system.

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The human eyes work by allowing light to enter and project onto a light sensitive panel of cells known as the retina at the rear of the eyes, where the light is detected and converted into electrical signals. These are then transmitted to the brain via the optic nerve.

Total blindness - The complete lack of form and light perception and is clinically recorded as "NLP," an abbreviation for no light perception.

Legal blindness - In North America and most of Europe, legal blindness is defined as visual acuity (vision) of 20/200 (6/60) or less in the better eye with best correction possible.

There are many diseases, disorders, and age-related changes that may affect the eyes.

See our diagram of the Basic Structure of the Human Eye

This series of articles provides some useful information on the human eyes, vision and products including screenreaders for the sight impaired and/or blind.

Vision Impairment and Eyesight Information

Color Blindness Information - Color blindness is usually classed as a vision disability. There is generally no treatment to cure color blindness. However, certain types of tinted filters and contact lenses may help an individual to distinguish different colors better.

Eye Surgery Treatments - Different techniques in treating various eye defects, the latest one being the laser eye surgery and LASIK.

Orbital Cellulitis of the Eye - Orbital Cellulitis is an infection that affects the eye and the skin and tissues surrounding the eye. It basically affects the eye and the other parts of your eye structure within the eye cavity. This disease can affect people of all ages and sexes and is a serious condition which should undergo treatment as soon as possible.

Pulfrich 3D Glasses - Apparent depth is a concept often explained as a phenomenon that occurs when retinal illumination decreases in terms of the other eye yields a corresponding delay in signal transmission, imparting instantaneous spatial disparity in moving objects.

Treatment for Dry Eyes - The incidence of dry eyes in America has grown dramatically over the past decade as the environment has changed, and the average age of Americans has increased.

Famous People With Vision Impairments Past and Present - A listing of famous and well known sight impaired people who were blind and blind in one eye including actors and singers

Nutrients Provide Relief for Chronic Dry Eye Sufferers - Dry eye is one of the most common, although not serious, eye conditions of middle aged people. It greatly interferes with the quality of life for approximately 14 percent of people over the of age 40. About 21 million people in the United States, it is realistically estimated that figure is probably more like 60 million, reported experiencing chronic dry eye symptoms.

How to Put in and Care for Contact Lenses - Like most, I've wondered how to put in contact lens easily and quickly. Spending more time than you thought it would, dropping the lenses, your eyes start getting sore, you are getting frustrated ... sound familiar?

Computer Vision Syndrome - The average American child spends almost one to three hours a day sitting in front of the computer. They have homework to do, friends to chat with, and video games to beat. All of this while sounding fun, can be quite a strain on their eyes.

How to Clean Sunglasses - By using these basic procedures you can ensure that your sun glasses will last many years and give you unsurpassed performance in providing excellent eye care and unmatched vision enhancement.

Vitreous Eye Floaters - A 50 year old woman calls our office complaining about little spots and fly like things floating in her vision and occasional flashing lights. We tell her to come in as soon as possible and we do a complete eye and retinal exam. She suffers from Vitreous Floaters, a normal condition.

When are you Legally Blind - Approximately ten percent of those deemed legally blind, by any measure, have no vision. The rest have some vision, from light perception alone to relatively good acuity. Low vision is sometimes used to describe visual acuities from 20/70 to 20/200.

What is 20/20 Vision? - 20/20 vision is customary visual acuity. Visual acuity is the ability to see cipher and stuff obviously from a vastness.

Reduce and Prevent Eye Strain - The summer season is already nearing its end, but with such dry weather, your eyes can still be put under a lot of strain. Fortunately, there are a few things you can do to help relieve and even prevent eye strain so you'll be able to keep using those babies for a long time.

What is Macular Degeneration? - Macular Degeneration is a condition that affects millions of people worldwide.

Bifocal and Toric Contact Lenses - Two of the most common contact lens prescriptions prescribed for people today are for the eye conditions of presbyopia and astigmatism.

Cataract Symptoms - Surgery and Treatment - When protein molecules in the eye's crystalline lens clump together and begin to block light entering our eyes, this is known as cataracts.

What is Photodermatitis? - Photodermatitis and its Symptoms Photodermatitis is a condition which occurs when the skin has an abnormal reaction to the suns ultraviolet light. There are two types of the condition, either acute Photodermatitis, or Chronic Photodermatitis.

Is LASIK Right for Me? - The subject of LASIK is a very interesting one. There is a lot to investigate and understand about the process of getting your vision corrected through laser surgery.

Ways to Beat Computer Eyestrain - If you work in an office, do your eyes hurt by the end of the working day? You aren't alone: about 88% of all people who work with computers experience a type of eyestrain known as Computer Vision Syndrome (CVS).

Protecting your Eyes from the Sun - UV radiation can play a contributory role in the development of various ocular disorder, including age-related cataract, pterygium, cancer of skin around eyelids and photokeratitis.

Natural Vision Improvement - The eyes are very big oxygen consumers in the human body You need to breath a lot of fresh air in every single day. The lack of oxygen leads to poor eyesight, while enough oxygen leads to better eyesight.

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