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Vision screenings are an easy and effective way to detect vision problems in children at an early age. If your child is diagnosed with amblyopia, it can be treated by different methods.
Congenital blindness is sometimes used interchangeably with "Childhood Blindness." However, current literature has various definitions of both terms. Childhood blindness encompasses multiple diseases and conditions present in ages up to 16 years old, which can result in permanent blindness or severe visual impairment over time. [2]
The Worth Four Light Test, also known as the Worth's four dot test or W4LT, is a clinical test mainly used for assessing a patient's degree of binocular vision and binocular single vision. Binocular vision involves an image being projected by each eye simultaneously into an area in space and being fused into a single image.
Put another way, suppose you have trouble seeing objects at a distance and you can only see out to 20 ft what a person with normal vision can see out to 200 feet, then you have 20/200 vision. The 6/6 terminology is used in countries using the metric system , and that represents the distance in meters.
For individuals at risk of developing glaucoma, the American Academy of Ophthalmology recommends screening every 2–5 years in adults under 40 years, every 1–3 years in adults aged 40 to 54 years, every 1–2 years in adults aged 55 to 64 years, and every 1 to 2 years in adults aged 65 years and older.
As of 2015, there were 940 million people with some degree of vision loss. [5] 246 million had low vision and 39 million were blind. [1] The majority of people with poor vision are in the developing world and are over the age of 50 years. [1] Rates of visual impairment have decreased since the 1990s. [1]