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Doctor insights on: Is It Okay To Use 2 Glasses Of Different Prescriptions

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Is it okay to use 2 glasses of different prescriptions?

Is it okay to use 2 glasses of different prescriptions?

Yes: Some patients have several different glasses for different situations (e.g. Driving vs computer vs very close work such as needlepoint). If the glasses are providing clear, comfortable vision, there is no harm in multiple pairs. ...Read more

Dr. Tim Conrad
797 doctors shared insights

Glasses (Definition)

Glasses is a term that describes a pair of lenses that are placed in a frame to be worn to correct faulty vision ...Read more


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Will switching between glasses with two different prescriptions affect my health?

No: However it may cause of short period of disorientation when you first change them. ...Read more

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What happens if you wear two separate pairs glasses, one old, one new prescription?

What happens if you wear two separate pairs glasses, one old, one new prescription?

Non-adaption: Many people need to adapt to a new glasses prescription. Wearing your old glasses will signficantly delay or prevent this adaptation. ...Read more

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How come my I have different prescriptions for my glasses and contacts?

How come my I have different prescriptions for my glasses and contacts?

Lens prescriptions: Contacts sit directly on the cornea. Glasses are in front of the cornea and therefore the power of the two differ in focusing an image on the retina. ...Read more

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Can you tell me if i switch from glasses(prism lens) to contacts(different prescription) will that cause unusual discomfort?

Depends: If you have double vision when you don't wear your glasses with prism, then you will have it with contact lenses. If double vision is not a problem for you, then contacts will likely work. ...Read more

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Can you tell me if you switch from glasses(prism lens) to contacts(different prescription) will that cause unusual discomfort?

Can you tell me if you switch from glasses(prism lens) to contacts(different prescription) will that cause unusual discomfort?

It can: Contact lenses do not correct for ocular misalignment like prism glasses can. If you need prism to avoid discomfort, then contact lenses are not a good choice for you. ...Read more

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Why is my contact lens and glasses prescription different?

Why is my contact lens and glasses prescription different?

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

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Are contact lenses a different prescription than my glasses?

Are contact lenses a different prescription than my glasses?

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

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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

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My contact lens prescription is different from my glasses prescription. Is it supposed to be like that?

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

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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?

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

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I use glasses at night and put on contacts in the morning. But my prescription for glasses is a lot lower. Is this okay?

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

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Prescription glasses, making things 3-d looking. How is this possible?

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

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Are glasses and contacts prescriptions the same number?

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

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My glasses are -7.25 what prescription would my contacts be?

My glasses are -7.25 what prescription would my contacts be?

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

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Are my glasses the wrong prescription if they keep feeling strange?

Are my glasses the wrong prescription if they keep feeling strange?

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

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Should i order contacts online with the prescription of my glasses?

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

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Is there a difference between a prescription for glasses and contacts?

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

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If my glasses have a low prescription do I have to wear them all the time?

If my glasses have a low prescription do I have to wear them all the time?

No: Wear them only when you feel the need to have your vision improved. Driving, reading, movies, meetings.... ...Read more

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How can I find the prescription of my glasses; is it printed on my glasses somewhere?

How can I find the prescription of my glasses; is it printed on my glasses somewhere?

No: Ask your eye specialist to write it down for you. Or bring your glasses to an eye specialist and they have a machine which can determine your approximate prescription. ...Read more

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What are the numbers on prescription glasses?

What are the  numbers on prescription glasses?

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

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Is wearing someone else's prescription glasses bad?

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