Not so long ago, a friend asked if I had
central or peripheral vision. I had to ponder this before I could answer. While
the question was absolute, the answer was not so clear-cut. I tried to explain this
to my friend but partial sight isn’t easy to define.
Sight is difficult to explain. How could I
tell my friend that while I might see well enough to pick out a shiny piece of
paper on the floor, yet I might not see the side of a truck parked across my
pathway. I suppose that for the most part I don’t have central vision. I can’t see
the print on a page or the expression on someone’s face, but this doesn’t mean
that my peripheral vision is clear either. I see differently from each eye and
differently again from each part of the eye. I think that I see more clearly from
the lower part of my eyes because I find that wearing a face mask cuts down on
that part of what I see. Having said that, often I don’t see small objects –
fire hydrants, dogs, little children – when they are right in front of me.
I see better, or at least think that I do,
in familiar surroundings. Perhaps my brain is just telling me that I can
actually see what I know to be there. I don’t see as well if I am tired or
unwell. I see bright contrasting colors more easily than muted tones. I see
better in bright lights but am often confused by shadows. I wonder if what I
see is a flat image or actually a solid shape. Lyle is often startled when I jump at shadows.
I think that the range of terms we use to
describe partial sight is another indicator of the difficulty in defining
vision. We use terms like limited sight, visually challenged, partial
blindness, partial sight, legal blindness, low vision, vision impairment, and
sometimes, just blindness.
Recently I read a book where the author had
completely lost her sight due to an injury. However, after a prostheses was
inserted into the one eye she regained light perception in the other. She was
able to distinguish between light and dark. She could tell if the lights in the
room were turned on and could see whether it was night or day. How would you describe
her sight? Because she could see something, was she blind or could she see?
Would partial sight adequately describe her condition? If so, could we use that
same term of partial sight to describe what I can see which is far more than
light perception?
It is a conundrum! The vagaries of sight
are definitely individual. Vision can be measured by the tools in the office of
an optometrist or ophthalmologist, but the lived experience of partial sight is
obscure to be sure. Partial sight can
only be measured on an individual basis and is also measured by how that
individual deals with the uniqueness of his/her partial vision.