2. • Supplementary lens in a mounting that fasten to the
frame front
• Fit outside of the frame
• Sunglasses or Prisms
To view more presentations and articles, visit www.eyenirvaan.com
3. • Contains a cell where the lens may be dropped in and
added behind the prescription
• Cosmetically not well accepted
• Similar to trial frames
• Not stable
To view more presentations and articles, visit www.eyenirvaan.com
4. • Has hinge placed at the bridge and half way the temple
• Enables the spectacle to fold to about ½ of its size
To view more presentations and articles, visit www.eyenirvaan.com
5. • Equipped with additional extension behind and parallel to
the lower eye wire
• Also known as “crutch” glasses
• Supports the lower lid and prevents the lashes to touch to
the cornea,
6. • Specially designed frame fronts
• Absence of temple , instead a clip or a stick present
which helps to be held in the front of the eye
• Used in optical stores to show difference between two
lenses
To view more presentations and articles, visit www.eyenirvaan.com
7. • Has a crutch positioned at the upper rim of the frame
front
• The crutch prevents the lid to droop down giving it
support
8. • Has refracting prisms incorporated to see straight while
looking down
• Useful for reading while sleeping
• Useful for bed ridden patients
To view more presentations and articles, visit www.eyenirvaan.com
9. • Used as field expanders
• Has prism on one side with the base towards to the blind
side
To view more presentations and articles, visit www.eyenirvaan.com
10. • Has 2 frame fronts
• One is fixed
• Another is flipped down when required
• Usually has the near add or sunglasses
11. • Independent rims that
are hinged to the part of
the frame
• Each lens is alone
• Right lens is tipped
down or sideways,
makeup may be applied
to the right eye while
viewing from the left eye
and vice versa
To view more presentations and articles, visit www.eyenirvaan.com