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Doctor insights on: What Is The Worst Vision You Can Have

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What is the worst vision you can have and still pass a driving test?

What is the worst vision you can have and still pass a driving test?

Check your state: "visual acuity screening standard is 20/40 or better with both eyes together, no worse than 20/70 in the poorer eye. Drivers who fail the vision screening are referred to a vision specialist.
Drivers with visual acuity of 20/200 or worse may not be licensed to drive. Drivers may use bioptic telescopes for driving, but may not use them to meet the vision standard". ...Read more

Dr. Richard Bensinger
1,726 Doctors shared insights

Vision (Definition)

Vision is a feature of a person's brain that allows him to see. He must have normal eyes, optic nerves (that stretch from the eyes to the back of his brain), and visual cortex (the vision center in the brain), in order to see properly. An ophthalmologist is a ...Read more


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What is the worst vision you can have and still pass your driving test?

What is the worst vision you can have and still pass your driving test?

Varies by State: Most states set a limit of 20/40 in the best eye for their limit. There is some variation by each state. Check with your department of motor vehicles for the rules in your state. ...Read more

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What is the worst vision you can have and safely drive?

What is the worst vision you can have and safely drive?

Varies: Each state has its own limitations but the usual is 20/40 or better in the best eye. The field of vision is also included and must be 110 degrees in most states. Whatever criteria exists, you should only drive if you feel comfortable for the conditions encountered. ...Read more

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What is the worst vision that they will perform lasik surgery on?

What is the worst vision that they will perform lasik surgery on?

Eye parameters: The level of vision is not the criteria used for lasik evaluation. It is a combination of the refractive error (numbers like -6.00 on your eyeglass prescription) and the thickness of the front of the eye. Other factors include general health, age and history of eye disease. Check with your ophthalmologists for suitability or with the lasik surgeon you have chosen. ...Read more

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What are the worst symptoms of cushings disease with regards to your vision?

Field loss: Cushing's is due to a pituitary tumor that causes the body to secrete excess steroid. If the tumor is large enough, it can squeeze on the optic nerve with loss of vision. Prolonged steroid levels in the body can also cause cataracts and glaucoma. These are the major effects of this condition on the eyes. ...Read more

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Can your vision get worst if you wear glasses over time?

Can your vision get worst if you wear glasses over time?

No: This is a common misconception. Wearing glasses to correct refractive error does not make your vision worse or increase your refractive error over time. Refractive error is an imbalance between the length of your eye and it's optical power. Glasses simply compensate for that imbalance. ...Read more

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Please help! What is the worst your vision can be before you laser surgery is no longer an option?

Please help! What is the worst your vision can be before you laser surgery is no longer an option?

Any vision: Any vision is worth saving
so if there is a laser procedure that would protect and/or improve your vision, even 10%, I would consider it worthwhile. ...Read more

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What are vision impairments and do they get worst?

What are vision impairments and do they get worst?

Form of vision loss: Visual impairment is the loss of vision from some disease, trauma or degeneration that cannot be corrected by glasses, medication or surgery. In the us we use different terms to signify the degree of impairment such as "low vision", "legally blind" and "totally blind". These are defined by how good the best corrected vision is as well as how much of the peripheral vision is intact. ...Read more

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I had my eyes examined recently and it seems my left has actually improved in vision when it was my worst and weakest eye. Is this possible?

I had my eyes examined recently and it seems my left has actually improved in vision when it was my worst and weakest eye. Is this possible?

Absolutely, visual: Acuity is primarily determined by the curvature of cornea, the 6 extraocular muscles (which pull to rotate the eye), the shape of the lens (behind the iris) and intraocular pressure so as to focus light rays on the fovea centralis portion of the retina combined with light receptor density. Thus there are multiple interacting factors which can change, both quickly & over time, to change focus. ...Read more

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My left eye has been red for around 5 days, but my right is fine. The vision on my left eye is a little worst these few days, what's wrong? No allergies

An exam helpful: Red eye without comment on pain, but worsening vision makes me wonder about low grade inflammation, perhaps asymmetrical dryness or allergy. The latter two usually feel scratchy, dry, or itchy. With your arthritis like systemic history, i'd wonder whether you have an anterior uveitis. An exam is necessary for you and I recommend seeing an ophthalmologist. ...Read more

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Often feel dizziness. And sometimes dizzy brings white spot vision. Hand shaking getting worst?

Often feel dizziness. And sometimes dizzy brings white spot vision. Hand shaking getting worst?

Dizzy: There are many causes of dizziness. When you also see white spots, I am concerned about poor blood circulation, which may affect the visual cortex. In any case, call your primary care doctor for an appointment-- I am concerned about your health. ...Read more

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Sudden blurry vision with waves in it and now worst head ache of my life. I have a clotting disorder. Should I go to the ER or wait it out.

Sudden blurry vision with waves in it and now worst head ache of my life. I have a clotting disorder. Should I go to the ER or wait it out.

Classic migraine: Your symptoms are that of a classic migraine headache. But if you get any other neurological symptoms you should go to the er. Generally, visual symptoms like you had lasting 20-30 minutes followed by a bad sick headache are migraine. ...Read more

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I have a irregular period but its worst then before, I also have pain on my left side, cramps in my stomach, back pain, blurred vision and headache.

I have a irregular period but its worst then before, I also have pain on my left side, cramps in my stomach, back pain, blurred vision and headache.

Common problem: Irregular periods are one of the most common problems obgyns treat. If this is one time problem it usually resolves on its own. If this is a recurring problem you should be evaluated. Infections ; hormonal changes can cause spotting. If there is a concern for pregnancy then do a home pregnancy test. There are many options available to help regulate the menstrual cycle. Schedule a visit. ...Read more

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How can I impair my vision?

How can I impair my vision?

Really?: I'm not advising 'ways' to harm vision. Your eyes are probably the most precious resource that you have, so protect & take care of them. If you are having vision problems, see an ophthalmologist for an evaluation. ...Read more

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What is your non-vision time?

?????: I have never heard of this term but I guess it refers to periods without visual input (ie when eye are closed or during sleep). ...Read more

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Is 20/30 and 20/40 vision bad?

Depends: These are levels of vision that still indicate good and useful vision. If you are used to 20/20 vision and you have a drops to 20/30 or 20/40 (uncorrectable) then it may seem bad to you. In my state of washington, the break point for a driver's license is a vision level of 20/40, so the state does not consider this 'bad'. ...Read more

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Are vision defects hereditary?

Depends on type: Color vision defect is usually hereditary but can be affected by various meds including some anti-inflammatories, cancer agents, blood pressure meds, pr even aftergastric bypass. In addition recreational drugs can also be problematic. There are other eye diseases that can cause defects. ...Read more

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What is cause of declining vision?

Aging or disease: Difficult to answer without more signs and symptoms, test results. ...Read more

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What makes my vision randomly blur?

What makes my vision randomly blur?

Dry?: A common cause of vision fluctuations is dry eyes. An easy test is to try otc artificial tears 4x/day and see if the vision improves. If it does, you should see an eye md for definitive treatment. ...Read more

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Why is my vision going dark slowly?

PLEASE SEE AN EYE: Specialist as soon as possible. Many possibilities, some of them dangerous. ...Read more

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What causes my vision to become dim?

What causes my vision to become dim?

Many causes: Dim vision can be caused by cataracts, retinal problems or optic nerve issues. The key detail needed to better answer the question is how often/ when does it occur. If it is frequent or continuous, you should see an eye doctor soon. ...Read more

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Why am I seeing prisms around my vision?

Why am I seeing prisms around my vision?

Migraine: You are probably experiencing occipital migraine. You can confirm this by seeing if the same things occurs in each eye when you cover one and then the other. These usually are short lasting (5 min to 2 hours) and cause no permanent changes. If this test does not work as I have indicated, then see your ophthalmologist for a better diagnosis. ...Read more

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What is my vision if I wear -4.5 contacts?

What is my vision if I wear -4.5 contacts?

Hopefully 20/20: Are you asking what your vision would be if you were not wearing contact lenses or glasses? You would be around 20/100 to 20/200 based on my experience. This is assuming that you do see 20/20 with your -4.50 contact lenses. ...Read more

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Why do humans need rods & cones for vision?

Pixels: Rods and cones are individual cells packed into the retina as a carpet of light receptive capacity. They sum their input to put together a nerve input to the brain which is the site of actual image formation. Rods have less tight packing but greater sensitivity. Cones are packed very tightly and perceive fine detail and color. You should love your rods and cones. ...Read more

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Are there any way I could improve my vision?

Are there any way I could improve my vision?

Depends: It depends what is the cause of poor vision, if it's cataract people can have cataract surgery. Please consult an optometrist or Opthalmologist and they should be able to give you appropriate advice. ...Read more

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What causes bright squiggly lines in vision?

Migraine: Would be the most likely, but other possibilities exist as well, so you should see your ophthalmologist. ...Read more

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What are the possible causes of halo vision?

Numerous: Migraine or glaucoma come to mind for me. Migraines are benign, but glaucoma can be serious and you can go blind. I'd see an eye physician soon! ...Read more

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Why is it that my vision keeps going central?

Why is it that my vision keeps going central?

See below: Symptoms like these are best deterimed by a thorough evaluation by your physician. Based on his/her findings, a treatment plan can be developed to help you. ...Read more

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What are the possible causes of shaky vision?

What are the possible causes of shaky vision?

No such thing: I have never heard of shaky vision. There is a condition called nystagmus where the eyes rotate or move back and forth when awake. ...Read more

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What causes snowy vision and what makes it worse?

What causes snowy vision and what makes it worse?

Brain dysfunction: Snowy vision is caused by brain dysfunction in the right lingual gyrus. It is seen in patients with persistent migraine aura. It can also be seen with optic neuritis caused by MS. Often no obvious cause is identified. ...Read more

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What are squiggly lines in my vision from time to time what isit?

Depends: If it is intermittent and moves, then it's likely a floater in the vitreous. If it doesn't move and is constant or increasing, then can be a problem in the retina. Sometimes a moving line of light can be representative of a cortical problem like an optic migraine. ...Read more

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Hola, tengoretinosis pigmentaria, como se que estoy perdiendo vision o no?

Considera que es: Para obtener más respuestas de más médicos, considere volver a enviar usando la función de traducción al inglés. **For more responses from more doctors, consider resubmitting using English translation feature. ...Read more

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What causes vision blurry?

What causes vision blurry?

Long list: Vision can get blurry from uncorrected need for eyeglasses, diseases of the cornea, inflammation of the inside, eye dryness, retinal disease like diabetes and a host of other things. If the vision is becoming blurry, see your ophthalmologist to sort this out. ...Read more

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Could bananas worsen your vision?

Neutral: Bananas are a good source of fiber, calories and potassium. These are good for the body but make no difference to the eye. If your vision is worsening, despite banana ingestion, then you need to see an ophthalmologist. ...Read more