contact lens

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con·tact lens

a lens that fits over the cornea and sclera or cornea only; used to correct refractive errors.

contact lens

n.
A thin plastic or glass lens that is fitted over the cornea of the eye to correct various vision defects.

contact lens

a small, curved lens, primarily plastic in composition, shaped to fit the person's eye either to correct refractive error or to enhance appearance. The two primary forms of contact lenses are (1) rigid gas-permeable lenses, which are small, are durable, and have little to no water absorption; and (2) soft lenses, which are larger, are more fragile, and have a 30% to 70% water content. Contact lenses float on the precorneal tear film and must be inserted, removed, cleaned, and stored to prevent damage or infection to the eyes. Patients should not sleep with their lenses in their eyes.

contact lens

Ophthalmology Crystalline ocular lens A transparent soft or rigid device placed directly on the cornea to correct refractory errors

con·tact lens

(kon'takt lenz)
A lens that fits over the cornea and sclera or cornea only; used to correct refractive errors.

contact lens

An optical correction worn in contact with the cornea and taking the place of spectacles. Most contact lens wearers are shortsighted (myopic) and enjoy a generally better standard of vision than with glasses. Hard contact lenses are made of acrylic PMMA (poly-methyl-methacrylate or ‘Perspex’) or CAB (cellulose acetate-butyrate) or co-polymers of various plastics. Soft lenses are mostly made of HEMA (hydroxy-ethyl-methacrylate). Hard lenses are always of smaller diameter than the cornea, soft lenses are usually of greater diameter.

Patient discussion about contact lens

Q. Contact lenses I’m 17 years old girl, and I have glasses since third grade. I never had any real problems with wearing them,. my best friend always encourage me to try contact lenses, but it seems so strange to put something on directly on your eyes- is it safe? How difficult is it to do?

A. Consult your ophthalmologist (eye doctor) before you decide.

Q. My contact lenses get very dry and it hurts. any suggestions?

A. Dry contact may signal they should be replaced with new ones, and pain may result from damage to the lenses (e.g. torn lens- VERY VERY hurts). However, as much as I would like to help you, it's just impossible to give you the correct diagnosis over the net without even looking at your eyes. So if you feel any problems with your eyes, ophthalmologist (eye doctor would be the answer).

Meanwhile, you may read more here:http://www.nlm.nih.gov/medlineplus/eyewear.html

More discussions about contact lens
References in periodicals archive ?
9% to contact lens solutions to check for possible contaminations.
They inquire whether the geographic pattern of AK outbreak-associated cases coincides with distribution of [greater than or equal to]1 manufacturing plants for the associated product, Complete MoisturePlus (CMP) multipurpose contact lens solution (Advanced Medical Optics [AMO], Santa Ana, CA, USA).
This update summarizes epidemiologic developments in this investigation, which indicate an association with Bausch & Lomb's ReNu with MoistureLoc[R] contact lens solution.
Recent reports in Bristol and Manchester indicate an increase in cases seemingly related to a contact lens solution.
Together, these outbreaks raise concern about the safety of multipurpose contact lens solutions and related consumer behavior.
to research, develop, and commercialize the company's Aganocide[R] compounds to treat eye, ear, and sinus infections, as well as develop the next generation contact lens solution.
BACTERIA CAN survive for longer in contact lens solution than was previously believed, a new study has shown.
Given the complexity of contact lens solutions and the environment within which they are expected to work, the FDA should re-examine the concept of equivalency testing--the practice of determining if new products are substantially similar to existing approved products--when a revised formula is submitted.
The 155-year-old company sells a wide array of products, including contact lenses, contact lens solutions, pharmaceuticals, O-T-C treatments and surgical procedures.
With more lens wearers, sales of contact lens solutions and related accessories should revive.
According to the lawsuits, studies published well before the product was recalled showed the disinfectant in Complete[R] MoisturePlus[TM] was vastly inferior to hydrogen peroxide as well as other multipurpose contact lens solutions on the market in eradicating Acanthamoeba.
POLAROID CONTACT Lens Solutions has launched what is said to be the world's first pre-filled contact lens case, Contactspod.

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