You do sometimes need glasses for 20 50 vision as having 20 50 vision means that you can see 20 feet what someone with normal 20/20 vision can see at 50 feet.
When you have 20/50 vision you may need glasses or contact lenses for driving and other activities that require good visual acuity although glasses or contact lenses may not always be necessary.
20/50 vision is below average vision and can cause difficulties with some tasks but it's not considered legally blind or as bad as legally blind which is 20/200 or worse.
Normal vision is 6/6 in meters and 20/20 in feet.
Your eyesight can get worse due to eye strain, aging, genetics and medications or medical conditions.
As you age, your eyesight can naturally get worse and genetics, eye strain and not eating healthy can also lead to eyesight becoming worse.
Potential causes of rapid eyesight deterioration or unilateral changes include, cataracts, age related macular degeneration and diabetes and diabetes related issues.
Not protecting your eyes from the sunlight and reading in low light conditions or staring at a computer screen to much or phone screen to much, especially in the dark can also strain your eyes and make your eyesight get worse.
LASIK or LASEK eye surgery can reshape your cornea and improve your vision so that you won't need to wear eyeglasses or contact lenses.
The only way to cure your eyesight is to eat healthy and have laser eye surgery or cataract surgery done to correct the vision loss.
In some cases wearing eyeglasses or contact lenses can be enough to correct your vision although in more severe cases you may need laser eye surgery, cataract surgery or even eye injections depending on the cause of the loss of eyesight.
To stop losing your eyesight you should eat a healthy diet that is rich in fruits and vegetables and omega 3 fatty acids and vitamins and also get regular eye exams, and manage any underlying health conditions and get plenty of exercise.
If needed you may need injections into the eyes or near the eyes to slow down or prevent the loss of eyesight.
If you start noticing vision loss you should see an eye doctor to get the eyes checked out and in some cases the loss of eyesight can be reversed even though laser surgery and sometimes it may be a result of you have cataracts which can also be fixed through cataract surgery.
You should also engage in regular exercise to improve your overall health and reduce your risk of high blood pressure and diabetes which can also lead to poor eyesight.
The fruits that is good for the eyes are, berries and blueberries, kiwi, citrus fruits, oranges, papaya, avocados and grapes.
Other foods that are good for the eyes are carrots, leafy greens, sweet potatoes, eggs, apples, spinach, Kale, bananas, bell peppers, bright orange vegetables, almonds, sunflower seeds, salmon and other fatty fish, apricots, beans, broccoli, tomatoes and other types of fish.
You can improve your weak eyesight by eating a healthy and well balanced diet such as fish high in omega 3 fatty acids, carrots and dark leafy greens.
Taking some omega 3 supplements can also help improve your eyesight and eye power and eye health and using protective eye wear to prevent damage to your eyes can also help and wear sunglasses in the sunlight to protect your eyes from the UV rays.
You should also get plenty of sleep, get regular exercise and have regular eye exams to help keep your eyes healthy.
Having eye surgery such as Lasik eye surgery can also improve your weak eyesight or vision and eye power.
Eye power is the refractive power of the eye and is the ability of your eye to bend light rates to focus on your retina.
And having refractive errors such as nearsightedness or myopia and farsightedness also known as hyperopia occur when your eye does not focus light correctly, which leads to blurry vision.
Refractive surgery such as LASIK eye surgery can reshape your cornea and correct refractive errors and potentially reduce or eliminate the need for contact lenses or eyeglasses.
Glasses or contact lenses can also help correct refractive errors by providing you with the necessary lenses power to focus the light correctly on your retina.
Eating a balanced diet that is rich in minerals and vitamins and staying hydrated and getting enough sleep and limiting screen time can also improve your eye health.
To know your eye power also known as refractive error you will have to see an eye doctor by scheduling an eye exam.
The eye doctor or optometrist or ophthalmologist will perform some eye tests such as retinoscopy and visual acuity, which measures how well the eyes focus light and determine any necessary lens correction.
The eye doctor will perform a visual acuity test which is often done using the Snellen chart that measures your ability to see letters or symbols at a specific distance which helps to determine if you have 20/20 vision or require corrective lenses such as eyeglasses or contact lenses.
A refraction test will also be done by the eye doctor which uses a phoria or autorefractor that helps to determine the power of lenses that are needed to correct any refractive errors such as myopia also known as nearsightedness and hyperopia also known as farsightedness or astigmatism.
Another test that is done by your eye doctor for determining eye power is a retinoscopy which is a test that uses a handheld device called a retinoscope to observe your retina under a beam of light which helps to determine your eyes refractive state and the power of any lenses that may be needed to correct the vision.
An autorefractor eye test uses and automated device or autorefractor to measure the refractive error of the eye by analyzing how the light reflects off your retina and helps to determine the power and type of contacts or prescription glasses if needed.
And a visual field test is a test that measures the range of your vision and helps to identify any loss of vision or other eye conditions.
Also the numbers that you see that are written in your eye prescription under abbreviations such as SPH, OS and OD determine your eye power.
The numbers range from (+/-) 0 to 20.