yes, they are.
Contact lens back surface isn't important for the dioptric power; the frontal sourface replaces the frontal sourface of the cornea. So the light angle of incidence is modified and the light focalize correctly on the retina.
concave lense is a piece of smooth glass that is thick from the edges and thin from centre and is used to diverge light rays.
Depends on the type of defect of the eye
Lenses should only be used after being prescribed by an optician or optermist! netlenses.com.au
It is possible to do so - you will need to contact your optician.
No you do not. I started with daily disposables when I was 11years old.
Yes a web site such as http://www.coloredcontacts.com/ sells them
to magnify it
contact lenses are concave because their sides curve inward
Contact Lenses are very important..they have given confidence to the people..who have low esteem due to glasses..
the maybelline falsies one is good it dosent have nylon fibres in it.
Short Contact Lencesnear sight is hyopia
A concave lens is a lens that is thinner at the center and thicker at the edges. It is used to correct myopia (nearsightedness) by diverging light rays before they enter the eye, thus helping to focus the image on the retina. Concave lenses are often used in glasses or contact lenses for people with nearsightedness.