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The 'grade' you are asking about is the dioptres (units of measurement of sight), which in turn is your optical or ophthalmological prescription. These would be the same regardless of the method of visual correction device, so yes, they are identical.
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∙ 11y ago
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Image of object formed by a lens on the screen is not in sharp focus suggest a method to get clear focusing of the image on the screen without disturbing the position of the object lens or the screen?
You could insert a second lens in the focal path, between the object and the first lens. The second lens can be designed (or moved) to focus the image on the screen. This is the same function that eyeglasses do for people with poor vision. The second lens, the eyeglasses, are inserted between the viewed object and the lens of the eyes. The second lens is designed to correct the distortion of the eye lens, thus creating an in-focus object on the "screens" of the eyes.
Are contact lenses prescriptions different from glasses prescriptions?
No. Although contact lenses have the benefit of covering the entire field of view, and do away with the drawbacks of having a pair of glasses that can fall off, they also contribute in many ways to the development of eye diseases. Contact lenses, when improperly handled, can cause irreparable damage to the cornea.
Is contact lens exam the same thing as vision eye exam?
I believe the exam is the same, but with the contact lens exam the optometrist checks and measures your eyes for the proper fitting of contacts.
Is the glass magnifying glass the same as the glass of eyeglasses?
Yes, its just that a magnifying glass has a different prescription than eyeglasses.
How much do cosmetic contact lens costs to buy in Denver, CO?
They cost about $15 per lens. This is about the same as most areas.
Some mascara went into my eyes stick on my contact lens can I continue to wear the contact lens are they harmful to the eyes?
My dad is an eye doctor and the same thing happened to me... you should just wash it out well with your lens solution and it'll be fine.
Will discount contact lens match your prescription exactly?
Yes, discount contact lens can still match your prescription exactly. All companies have quality standards that they have to meet, so regardless of where you purchase your prescription lens, you will get the same prescription all the time.
Can I ask for eye exam fee for contact lens ?
Unfortunately no one offers free eye exams for contact lenses, only for eye glasses. The places that offer free eye exams for glasses often offer cheap contact lens exams. America's Best is one of those and they also have a deal where you can join a club for the same price as the contact lens exam and then you get free exams for the next couple of years.
Why is 100x microscope lens called oil immersion lens?
Because that lens (it does not HAVE to be a 100x lens - other lens magnifications are also available in oil immersion constructions) is made to be in contact with a drop of special oil which covers the specimen. The oil has the same index of refraction as the front lens glass and that way a different optical construction can be used.
Is optical center is same as the geometric center of a lens?
no it is same
What happens if you put a contact lens in the wrong eye?
Nothing for me, I just took it back out (but probs best to get a new contact lense don't use the same for the other eye hot hygenic reasons..)
What is a negative lens is the same as?
If the lens equation yields a negative image distance, then the image is a virtual image on the same side of the lens as the object. If it yields a negative focal length, then the lens is a diverging lens rather than the converging lens in the illustration.
