Vision and Eye Care

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.

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

Each line on the eye chart has a different floor number normally from 20/200 down to 20/10.

The top number represents the vastness a role being hardened stances from the eye chart. The floor number represents how far away a role with customary vision can be from the chart and still read the words. So, a role with customary vision can read the 20/20 line from 20 feet away, the 20/200 line from 200 feet away, and the 20/10 line from 10 feet away.

A role with 20/10 vision can read from 20 feet what a role with customary vision must move up to 10 feet away to read, and thus has better than customary vision. Conversely, a role with 20/200 vision can read from 20 feet away what a customary role can read from 200 feet away, so has really mediocre vision. The eye chart at your physician's position has been scaled down to fit the space, so while you may not actually stance 20 feet away, the ratios mean the same thing.

Visual acuity assesses.

The Smelled eye chart, urbanized by 1862 by Dutch Ophthalmologist Dr. Herman Smelled, is the primary and most normal eye chart.

Other assess have been urbanized with the dropping E, the damaged sweep, and the ETDRS assess. The dropping E and damaged sweep assess were urbanized for small children and those adults who cannot read words. The dropping E chart skin a wealth E facing up, down, left, and right. The role being hardened is asked to react with route the E is facing. The damaged sweep assesses uses cards with movies of cars, some with undamaged wheels and some with damaged wheels. The ETDRS assess was primarily urbanized for the Early therapy of Diabetic Retinopathy revise. The ETDRS assess uses words, but is considered to be more accurate than the Snellen eye chart.

20/20 may not mean textbook global vision.

Because these assess only appraise visual acuity, you can have 20/20 vision and still have vision evils. A role with 20/20 vision may have bother since stuff close up, mediocre strength perception, difficulty focusing, or mediocre peripheral vision. Eyes are hardened separately and together. Many people have a different gain for each eye.

During the second part, we must switch to a more serious side to fully communicate the subject matter in a way for all to understand.

What is best assessed vision?

Your best assessed vision is the best visual acuity you can achieve with assistive lenses. Regularly people who cannot attain 20/20 vision with assistive lenses have better outcome with LASIK surgery because LASIK surgery can assess crafty imtextbookions in the vision approach which assistive lenses cannot address.

What vision gains can mean to you. A role with 20/200 best assessed vision or shoddier (senior) is considered lawfully blind. 20/40 is the nastiest vision gain you are tolerable to have to achieve an unrestricted drivers warrant. 20/50 is the check for many professions.

Attaining 20/20 vision.

Some people find that glasses and call lenses are too uncomfortable and inconvenient, or minimally do not want to be reliant on these effects. Others find that assistive lenses are not enough and can gain from a combination of LASIK surgery and assistive lenses. If you do not have 20/20 vision, or if you have 20/20 vision but still experience vision evils, your eye physician can help you resolve if assistive lenses or LASIK surgery is the best selection for you.

Vision Clarity and Impairments by Sandi Baker/Visual Innovation & Solutions

To better understand visual impairment we need to first look at what 20/20 vision is. This is a term that is used express the sharpness of ones vision in measurement at the distance of 20 feet. What this means is if you have 20/20 vision you can see with clarity at the distance of 20 feet. Take for instance those with 20/60 vision. They must be as close as 20 feet to see what a person with 20/20 vision can see at 60 feet.

However, this measurement of 20/20 only refers to the clarity of vision at distances. There are other factors that pertain to vision skills. They included:

Hyperopia (far sightedness)

Presbyopia (loss of focusing ability)

Myopia (near sightedness)

Color Vision

Eye Coordination

There are over 7 million people over the age of 6 who have difficulty seeing words and letters even when they are wearing corrective lenses.

In the United States 17% of those aged 45 or older have a visual impairment even with corrective lenses too.

Visually disabled people without corrected lenses figures have reached to over 100 million in the United States with 80 million suffering from potentially blinding eye diseases. Over 1 million people are legally blind.

Looking at the major causes of visual impairments most of them are primarily due to age related diseases. These include:

Macular Degeneration

Cataracts

Diabetic Retinopathy

Glaucoma

They are affecting Americans more than ever before. A disturbing fact is that the number of Americans with age related eye disorders and vision impairment is expected to double within the next three decades. The total in 2030 is expected in be 357 million.

Facts:

AGE-RELATED MACULAR DEGENERATION (AMD)

• 13 million people have signs of macular degeneration.

• 6,300,000 people are projected to develop AMD in 2030, compared to 1.8 in 2004

• 1,200,000 people are in the later stages of macular degeneration.

• 230,000 people are blind from macular degeneration.

CATARACT

• 5,500,000 people have vision obstructed by a cataract.

• 3,700,000 visits are made to doctors' offices each year because of cataracts.

• 1,350,000 cataract extractions are performed each year.

• 400,000 new cases of cataracts develop each year.

• 30.1 million people are projected to have cataracts in 2020 as compared to 20.5 million in 2004.

RETINAL DISEASE (Diabetic Retinopathy)

• 16 million diabetics are prime targets for blinding disorders.

• 7 million diabetics suffer from diabetic retinopathy.

• 700,000 diabetics are presently at risk of blindness.

• 100,000 people have retinitis pigmentosa (RP), a family of progressive inherited diseases that causes deterioration of the retina and blindness.

• 65,000 diabetics each year develop proliferative diabetic retinopathy, the most sight-threatening stage.

• 25,000 new cases of blindness are caused annually by complications of diabetes.

GLAUCOMA

• 60 million Americans are at risk for developing glaucoma.

• 3 million glaucoma-related office visits are made to doctors each year.

• 2 million people are visually impaired by glaucoma; 1,000,000 more have the disease but don't know that they do.

• 120,000 people are presently blind from glaucoma.

• 5,500 people become blind each year from glaucoma.

• 3.3 million people are projected to have glaucoma in 2020 as compared to 2.2 in 2004.

Fortunately many peoples vision can be corrected with lenses but there are so many that can not. The most important thing to remember here is to have regular check ups and to always follow your doctor's instructions. Your eyesight is very important.

Figures are from the "2004 Census & Visions Problems" and the Washington State of Ophthalmology.

You may also be interested in performing a home eye test with our Printable Snellen Eye Chart or learning the definition of When are you Legally Blind

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