join us now and you may have a chance to be our global moderator
just apply
tell us why you wanted to be moderator



 
HomePortalRegisterLog in
Search
 
 

Display results as :
 
Rechercher Advanced Search
Donation Button
Fileserve Ads
FileServe

Share | 
 

 Wear contact lenses can prevent ultraviolet?

View previous topic View next topic Go down 
AuthorMessage
fafafa
Trainee
Trainee


Posts : 9
Join date : 2011-01-03

PostSubject: Wear contact lenses can prevent ultraviolet?   Mon Jan 03, 2011 11:13 pm

Invisible [You must be registered and logged in to see this link.] as a method of correctional eyesight already get people generally accepted.
Recently, on the [You must be registered and logged in to see this link.] and launched a purporting to ultraviolet prevention lenses caused numerous consumers' concern. However, studies show that invisible glasses absorb ultraviolet light effect, has yet to prove.
Science considers proving, the strong [You must be registered and logged in to see this link.] is the main reason people with cataract. The Johns Hopkins university researchers think that more than 1 hour everyday basks in the sun, 1 years with risk of cataracts and increase 10%. Previous studies have shown that, outdoor [You must be registered and logged in to see this link.] if not wearing sunglasses and a hat, patients with cataract danger is three times the average person.
Ultraviolet rays in sunlight can be divided into three categories: UVA and UVB and UVC. Among them, the vast majority of the ozone layer UVA by the atmosphere absorb, and UVB, and UVC consists mainly of corneal epithelium and eyeball of crystalline absorption, this is the main [You must be registered and logged in to see this link.] of lead to cataracts.
As is known to [You must be registered and logged in to see this link.], lenses only cover part of the cornea, and ultraviolet ray of eyelids, whites in areas such as the same can cause damage. Therefore, up lenses not tinted glasses or sunglasses alternatives such as required, people should continue to wear ultraviolet prevention sunglasses.
Back to top Go down
 
Wear contact lenses can prevent ultraviolet?
View previous topic View next topic Back to top 
Page 1 of 1

Permissions in this forum:You cannot reply to topics in this forum
 :: Forum :: Chat-
Jump to: