Doctor insights on:
Is It Okay To Use 2 Glasses Of Different Prescriptions
No: However it may cause of short period of disorientation when you first change them. ...Read more
Can you tell me if you switch from glasses(prism lens) to contacts(different prescription) will that cause unusual discomfort?
Numbers game: Fitting cl is an art form as much as science. When the eyeglass refraction is placed in a cl if the number is large enough the strength of the contact may be different to cause good vision. The fit can also change the numbers. These are called "fudge factors'. The numbers are not as important as the ability to see wella nd comfortably. ...Read more
Yes: Contact lens also has size of size of cornea, in addition to power. That's why contact lens have to be 'fitted'. The power may differ also, if the myopia is significant. ...Read more
My contact lens prescription is significantly different from my glasses prescription. Is this normal?
A small difference : Is normal. A significant difference would be unusual but it could just be the way it is written in a different format. ...Read more
My contact lens prescription is different from my glasses prescription. Is it supposed to be like that?
Yes: The optical principle is lens effectivity. As any lens is moved away from your eye it becomes inherently more powerful (positive) the inverse is also true, as a lens is moved to eye, becomes weaker (negative). So contacts and glasses are adjusted accordingly only if it will affect the final clinical outcome. ...Read more
An eye examination by od showed -2.00 left eye for glasses. But, it was -3.25 two yrs. Earlier and -3.50 three yrs. Ago. prescription not made yet. Re-exam?
Rx check: Transcription errors occur, though in a younger myope, over-minus prescriptions are often the result of a too quick refraction and unclear endpoint. If you really want to know how low you can go, ask for a cycloplegic refraction to determine the baseline without the variable effect of focusing during the evaluation. Most opticians offer a 30 day grace period to account for "dr. Error.". ...Read more
Yes, but: Why would you want to do such a thing? ...Read more
Yes: Why not use color contact lenses with an appropriate prescription? ...Read more
No: Won't work.Get a more detailed answer ›
Yes: You can also buy them over the counter at any drug store. ...Read more
I use glasses at night and put on contacts in the morning. But my prescription for glasses is a lot lower. Is this okay?
Yes.: Once you get beyond a certain eye power, the numbers for glasses versus contact lens power will change to obtain the same level of vision. For example, if you wear -4.00 in glasses, you're contact lens power will likely be -3.75. Conversely, if you wear a +4.00 eyeglass, your contact lens power will likely be +4.25. Any astigmatism number may also be different. ...Read more
My daughter (6) just got glasses for the first time. Sph +2.50. Supposed to wear them full time but says everything is blurry. Wrong prescription?
Bet you're right: Get her seen by someone else. I'm sorry this happened. ...Read more
You can see!: Some of my patients have remarked to me on how prescription glasses allow them to see very well, including comments that they now see in hd or 3d. What they are observing is how great the eye can really see when given the proper correction. Wear your glasses and enjoy the good vision. ...Read more
Different: They are different. Often the overall power will be similar or the same, but contact lenses require more specifications, such as the curvature of the lens as well as type of material. ...Read more
Not enough info: In order to fit contact lenses to your eyes, you need the corneal curvature in addition to the glasses power. Also a discussion of your vision goals, such as any need to see well at near and distance versus distance only, is used to determine the initial contact lens parameters. Your eye care provider will make these measurements. ...Read more
Possibly: If the prescription is wrong, then the image perceived will be of lower quality than you expect - e.g. Distorted or blurred. This can result in your feeling strange. The glasses might also have the optics misaligned. If you ophthalmologist prescribed them recently, and you saw clearly when he did the refraction in the office, then it is possible they might be wrongly made. Have this evaluated. ...Read more
Non: You need a few numbers that are parameters for the fit of you eye i.e. The base curve, diameter and an adjusted power for lens effectivity if higher power then 5 diopters. ...Read more
Yes: The difference is called vertex distance. This is an adjustment for where the corrective lens is placed in relationship to the cornea. In the case of contact lenses this is zero and usually for glasses it is about 12-15 mm therefore the numbers will be different (less negative or more positive) for contact lenses. ...Read more
I don't need glasses, I can see perfectly, I can read small text from across the room and everything. But why can I see just fine in any prescription?
The power: Generally an eyeglass rx is written as follows: first right eye (may be abbreviated as od) then left eye (os). The prescription for each eye is written as sphere cylinder (including axis) then add. Sphere is either a plus number - (far sighted) or minus (near sighted). Cylinder is correction of astigmatism - a distortion like a funhouse mirror. It has direction - hence the axis - or direction. ...Read more
Notusually: Under the age of 9, wearing the wrong prescription might hinder the development of the visual system. Afer age 9, no harm, just blurred vision! ...Read more
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