If I wear -6.00 contacts, what is my vision?

Question

Okay the first two answers suck. I know that I can't see without correct.

I want to know that numbers. ie 20/20 Anyone know of a sight that can give me the conversion.

I shouldn't have rush the additional details. I know that I can't see without correction.

And does anyone know of a "website" that has a conversion table of some type?

Answer 1

I found this table and it should be helpful for you! Hopefully!!

http://www.lpf.com/source/rk/20something.html

Answer 2

I do not think there is an actual conversion chart as to what the amount of diopters to correct 20/something vision. I wear a -7 and -7.5 currently...and am 20/400 without correction, and able to be corrected to 20/20 +.

The strength of your correction is based more on how your eye bends and receives light...which involves corneal thicknesses, something called axial eye length (the measurement from the front of your eye to the back), and how well your lens focuses.

I do not believe there can be a standardized chart as everyone is different with their corneal thicknesses and how long or short your eyes are. There might be an approximation.

When you go to your optometrist, with your -6 diopter lens in front of your eye, if you can see the 20/20 line...then your corrected vision is 20/20. I cannot even see the chart when I do not have glasses on or contacts in, so I'm waaay off the charts, but am correctable to where I can even see about half of the letters on the 20/15 line.

Answer 3

Your vision, or how good you see, is the smallest distance between two points that you can discern are two points.

oh that helps!

ok. ok.

The numbers you are indicating, the -6.00 or whatever...indicate a distance you can see without correction...not how well you can see.

The power of the correction is equal to one over the distance in meters.

Thats IT!

So, if you were focused at one meter, 1/1=1. You'd need a -1.00 to see at infinity or 20 or 30 feet or further.

If you were focused at a half meter, your eyes would be so strong, that you couldn't see clearly beyond a half a meter. P=one over onehalf or 2. So you'd wear a -2.00 to see clearly more than a half meter away.



If you wore a -3.00, you'd have 'stronger' eyes because you are already focused at a thrid of a meter in front of you and everything further out would be blurred.

If it was 1/4 of a meter...you'd wear a -4.00.

If a fifth of a meter, a -5.00.

A sixth of a meter would be the -6.00 you talk about. So you can see 1/6 of a meter in front of you and everything closer than that, pretty well.

When we look at the letters, the size of the letters subtends an angle from your eye. The 20/20 letter is about 5 degrees. At twenty feet, you see a letter 5 degrees big.

If you moved twice as far, you'd still only be able to see a letter 5 degrees big (cuz that's the best you could see at 20 ft and the angle, that 5 degress isn't going to change) so you'd be standing at 40 ft. and you'd see the 40 foot letter. If you moved 60 ft., you'd see the 60 ft letter, cuz it's 5 degrees, you are standing 60 feet away, and the smallest letter has to be bigger than the 20 ft letter cuz you can't see that little thing so far away as now the 20 foot letter is smaller than 5 degrees and it's just too small to be able to see.

So...
if you can see the 20/20 letter..that's considered good. If you need to be corrected with glasses or contacts or whatevers to see that 20/20 letter, and you can still see it, you have good cameras.

But if the best you can do is see the 20/80 letter when you are wearing some type of correction, when normal people would be standing way back at 80 feet and still be able to barely make out that letter, you have something causing that lower than normal vision as you would have to be at 20 feet to see that big 80 foot letter, so your vision would be stated as 20/80. If 20/100, normal folks are way back 100 feet away (third of a football field) and you are up at about the 7 yard line to see the same letter.

If it's correctable with glasses or contacts...good. If not then there's something wrong with the camera, the eye. Moving from front to back...the cornea might not be right or have a scar or opacity, something could be in the space behind the cornea, something could be fogging the lens (some type of cataract), something could be in the cavity behind the lens such as blood, or cells or tumor floating around in there, the center part of the retina (the macula) could be sick or injured such as looking at the sun and burning it, or a welder's arc, or a disease such as diabetes causing swelling (edema)...or macular degeneration (usually for older folks), or the nerve could be sick such as with multiple sclerosis, optic neruitis (inflammation of the nerve)..or going further back..something in the orbit (bony socket in your skull in which your eye is located) causing pressure on the nerve..or further back vascular or tumor things causing pressure on the nerve pathways... and on and on and on....

Answer 4

If there is an exact conversion, I don't remember it. Many factors play a role in how each person discerns the letters, lighting, contrast, clarity and function of the parts of the eye..to name a few. You can test yourself if you have access to a Snellen eye chart. Stand at a distance of 20 feet away from the chart, cover one eye (without your correction), and look at the big "E" which is 20/400. Walk forward until you begin to discern the big "E". Measure the distance from where you stopped to the location of the chart. For example, if you stopped 4 feet in front of the chart, you are seeing 20/400 at 4 feet. You'll need to multiply 400 x 5 to know what size letter you'd be able to see at 20 feet. You'd be around 20/2000 in this case.

Answer 5

There is no conversion table. (according to the above table my vision without my glasses should be alot worse than it is so for me that is obviously inaccurate)
You need to get the numbers from your eye doc as to what you tested at both with and without correction.
With correction you should be as close to 20/20 as you can get.
Without correction varies per person.
When I say correction I mean with either glasses or contacts.

Answer 6

Does it matter other than you have really bad vision. You probably can't see without your contacts or glasses.

I had -6.25 and -6.75 when I had RK....... years and years ago. I couldn't take a shower without my glasses. If I dropped my glasses someone else had to find them for me.

You would probably benefit greatly from Lasik....

Answer 7

Im not sure, I have -8.25 vision and I know Im almost legally blind..lol. So maybe that will help you. Your almost there! lol.

Answer 8

Pretty bad.