How to distinguish the front and back of contact lenses?
First time wearing contact lenses,preparations for soaking, cleaning, etc. are all done,the result is often difficult to distinguish between the front and back of the lens in the first step of wearing.The lens of the contact lens is small and thin,even if you often use it, there will also be mistakes,it is more difficult for beginners to distinguish,basically do not see any difference.
Why do contact lenses have to distinguish between front and back?This is because the parameters such as the curvature of the front and back of the lens are completely different,if you mistakenly wear contact lenses, the lens is very easy to fall out,and there will be foreign body sensation, tears, even you can’t open your eyes,at the same time, the edge of the lens may also scratch the cornea.Today, we offer three ways to help you distinguish between the front and the back of a contact lens.
The first way is more common,place the lens on the belly of the finger,observing from the side,the front will be full of bowls,the curvature is smooth and the edges are slightly buckled inward.But on the reverse side, the shape of the inverted straw hat will be presented,the edges are eversion and the whole is flat.
If the first way is still unrecognizable,you can take the second way,place the lens between the thumb and forefinger,gently squeeze, if the lens is closed inward,it means the front.
.If the lens does not get in the middle and sticks it to the finger, it means the back.
Last way,if you buy a colored contact lens,soak the lens in the care solution to carefully observe the pattern and color can also be resolved.The color is clear and soft, the front of the lens,otherwise it is the back.
I believe that by learning the above ways, everyone can easily and quickly distinguish the front and back of contact lenses.To prevent the lens from falling on the ground and being contaminated, do not flip it directly on your hand,you can put the lens back into the care solution,then take it out again and wear it.