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Doctor insights on: Difference Between Glasses Contacts Prescription

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

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

Dr. Tim Conrad
794 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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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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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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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?

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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Are prescription glasses or contacts the only fix for hyperopes?

Are prescription glasses or contacts the only fix for hyperopes?

No: Laser vision correction may be an option as well as phakic intraocular lenses. Speak to a refractive eye surgeon for more info. Have a great day! ...Read more

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If I wear prescription glasses and contacts, can I also get colored lenses?

If I wear prescription glasses and contacts, can I also get colored lenses?

Probably yes: Colored contact lenses are able to be fit on most patients. See your doctor. ...Read more

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Contacts, a nightmare on the road and abroad. Why not wear regular glasses? Will that change a prescription?

Contacts, a nightmare on the road and abroad. Why not wear regular glasses? Will that change a prescription?

Not if up to date: There are differences between a prescription for contacts and glasses although some similarities. Your ophthalmologist will determine the eyeglass correction and then use those measurements to recommend a contact lense. If you prefer eyeglasses, and you should have them anyway as a back up, then if up to date, by all means use eyeglasses. ...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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Does one need an updated eye prescription to purchase glasses/contacts?

Does one need an updated eye prescription to purchase glasses/contacts?

Yes: Most practioners require an eye exam, refraction and contact lens fitting be done annually in order to receive a contact lens prescription. For glasses, many optical shops will not fill a prescription that is over 6 months old. ...Read more

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Can you wear prescription contacts with prescription glasses at the same time...?

Can you wear prescription contacts with prescription glasses at the same time...?

Sometimes: The powers of the eyeglass and the contact are additive. They might add up to a proper prescription for you if designed that way and some visual problems need this as a purposeful set-up. You will not like it if you put full corrective eyeglasses on top of fully corrected contact lenses. ...Read more

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Do I need a separate prescription if I want to get glasses and I'm now wearing contacts?

Yes: Glasses and contact lens prescriptions are different. Your doctor should be able to provide you with a glasses prescription without examination is you have a current contact lens prescription. ...Read more

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My eye glasses prescription is -3.25... Does that mean it would be same if I order contacts?

My eye glasses prescription is -3.25... Does that mean it would be same if I order contacts?

Yes.: -3.25 would be the power of the contact lens. Assuming you are wearing a soft lens, You also need the other parameters which include the type of contact lens, the base curve and the diameter ...Read more

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I wear glasses (prescription) but only whn my eyes still constantly hurts in the sun watching tv etc vwey sensitive. Would you recommend contacts?

I wear glasses (prescription) but only whn my eyes still constantly hurts in the sun watching tv etc vwey sensitive. Would you recommend contacts?

Dry eye treatment: Artificial tears, ointment at night, low dose topical steroids, restasis, punctal plugs, and others are treatments for dry eye. Your symptoms sound consistent with dry eye. ...Read more

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Can a person with a prescription higher than -5.50 get ortho-k?? What is better lasik or OrthoK? I have astigmatism &dry eyes &hate glasses &contacts.

Can a person with a prescription higher than -5.50 get ortho-k?? What is better lasik or OrthoK? I have astigmatism &dry eyes &hate glasses &contacts.

Talk to eye doctor: This is not my specialty. Do note that anything affecting the cornea will worsen your dry eyes. Your eye doctors would be your best source for such a complicated issue. ...Read more

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My eye lid keeps twitching, so I got these new glasses after my old ones broke. They are the same prescription as my old ones. I ran out of contacts and started using my glasses full time now. All of a sudden. After a day. My right eye lid started twitchi

My eye lid keeps twitching, so I got these new glasses after my old ones broke. They are the same prescription as my old ones. I ran out of contacts and started using my glasses full time now. All of a sudden. After a day. My right eye lid started twitchi

Most: Most often, twitching is actually caused by stress, lack of sleep or caffeine. Modify these issues and things should get better. But it may take weeks for the twitching to go away. It is not related to changes in glasses, contact lenses etc. More complete info about eye twitching here:. ...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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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

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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