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 FOR PATIENTS


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The cornea is the transparent dome-shaped front part of our eyes
and their most important focusing lens. Like the lens of a camera,
its surface must be perfectly smooth in order to provide clear vision.
When disease or injury causes the corneal surface to become irregular,
the eye can no longer focus clearly, even with the strongest glasses.
Hard contact lenses have the unique ability to improve the vision
of these eyes by creating a smooth layer of tears that mask the
irregular surface of the cornea. However, there are many eyes with
damaged corneas that cannot be fitted with a hard contact lens.
Moreover, the corneas of patients who suffer from severe ocular
surface disease become so exquisitely fragile that they are often
unable to withstand the pressure of a blink or the briefest exposure
to airlet alone the friction of a hard contact lens.
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The Foundations Boston Scleral Lens offers a unique solution.
Unlike conventional contact lenses, this device, about the size
of a nickel, rests on the relatively insensitive white sclera of
the eye and creates a space over the cornea that is filled with
artificial tears. By masking the irregular surface of the damaged
cornea, this lens device can be helpful in improving vision in eyes
with extremely distorted corneas. Moreover, this fluid compartment
becomes a liquid bandage that protects the raw and sensitive cornea
from exposure to air and the rubbing effects of blinking. This therapeutic
environment nurtures healing and can virtually eliminate pain and
photosensitivity. It is this unique liquid bandage that is responsible
for the "miracle" experienced by our patients.
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One of the principal reasons for the success of the Boston Scleral Lens
is its highly oxygen-porous plastic, invented by Boston Foundation for
Sight founder Dr. Perry Rosenthal, that allows the cornea to breathe through
the lens. This is essential since the cornea, unlike any other surface
tissue of the human body breathes by extracting oxygen from the surrounding
air rather than from the blood circulation.
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