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.
Farlex Partner Medical Dictionary © Farlex 2012

contact lens

n.
A thin plastic or glass lens that is fitted over the cornea of the eye to correct various vision defects.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

contact lens

Ophthalmology Crystalline ocular lens A transparent soft or rigid device placed directly on the cornea to correct refractory errors
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

con·tact lens

(kon'takt lenz)
A lens that fits over the cornea and sclera or cornea only; used to correct refractive errors.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

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
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References in periodicals archive ?
The changing trends in consumer behavior have accelerated the sales of contact lenses. The rising burden of diabetes and technological innovations have paved the way for smart contact lenses into the market.
Dr Pramod Warhekar, Consultant Ophthalmologist at Mediclinic City Hospital, adds, "Infection of the cornea is the most important risk factor for patients who sleep with the contact lenses. In addition, it can cause more dryness of eyes and allergic conjunctivitis due to the deposition of proteins on the contact lens."
Clerio's technology enables the laser writing of unique patterns into contact lenses that optimise visual acuity, including superior correction at both far and near distances for those with presbyopia.
One of OTs biggest records was related to the story of a women who did not know that she had 27 contact lenses in one eye until the incredulous surgeon started to remove them.
"Research into the benefits of contact lens wear for children and teens found that contact lenses significantly improved their quality of life, so it's always worth a parent having a chat with their optician if their child is interested.
'People who wear reusable contact lenses need to make sure they thoroughly wash and dry their hands before handling contact lenses, and avoid wearing them while swimming, face washing or bathing.
"In a survey about contact lenses, 78 percent of teens expressed high interest in wearing contact lenses and that they can easily adapt to contact lenses and want to wear them more than any other age group.
Additional information on Contact Lens Health Week and the proper wear and care of contact lenses is available at https://www.cdc.gov/contactlenses.
According to (https://www.visiondirect.co.uk/eye-care-centre/are-contact-lenses-safe-for-my-eyes) Vision Direct , contact lenses can damage the eyes if worn incorrectly.
Discomfort, at 48 percent, is the number one reason cited for discontinuing the use of contact lenses.6 This statistic is important considering 31 percent of contact lens wearers in the Asia/Pacific Rim alone stop wearing their contact lenses each year.
Bausch + Lomb revealed on Wednesday the receipt of approval from the US Food and Drug Administration (FDA) for the Bausch + Lomb ULTRA family of contact lenses for extended wear of up to six nights and seven days of continuous wear.