1. Bifocal lenses
Things you should know about
bifocal lenses
http://www.eyehealthcare.net/bifoca
l-lenses.html

2. Introduction
• A person can have both
presbyopia and myopia. There is a
terrific choice for these
people, that is wearing bifocal
lenses.
• Benjamin Franklin is person who
invented the bifocal lenses
• the lower part will perform to
correct myopia and the upper
portion can fix the presbyopia.
• http://www.eyehealthcare.net/bifocal-
lenses.html

3. Advantages of bifocal lesnes
• They can help the wearer get rid of the need to switch back
and forth between two pairs of glasses
• Bifocal lenses with protective can help protect the eyes
from sunlight rays and dirt from the air.
• Because the wearer needs one pair of prescription glasses
instead of two, bifocals can be very cost effective.
• http://bifocallenses.blogspot.com/2012/10/things-you-
should-know-about-bifocal.html

4. Disadvantages
• You may have issue adapting
to the way that the contact
lens works.
• It may creat difficulty with
your depth perception.
• Only a few contact lens
wearers are candidates for
bifocal contact lenses
For further information • Eyestrain can happen and
http://www.eyehealthcare.net/bifocal- some potential
lenses.html complications are
headaches and scratchy in
the eyes