Special purpose frames

1. SPECIAL
PURPOSE
FRAMES
Fakhruddin S. Barodawala M. Optom,
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2. • Supplementary lens in a mounting that fasten to the
frame front
• Fit outside of the frame
• Sunglasses or Prisms
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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
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4. • Has hinge placed at the bridge and half way the temple
• Enables the spectacle to fold to about ½ of its size
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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
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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
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9. • Used as field expanders
• Has prism on one side with the base towards to the blind
side
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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
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