Presbyopia is far-sightedness in advanced age. As
human beings reach middle ___1___
, the lenses of the human eye loses its ability ___2___
change shape. Suddenly, older folks are unable to ___3___
on nearby objects. Presbyopia was not a problem in the
___4___ . A hundred thousand
years ago, the life ___5___
of a human being averaged 35 years. Being hunters by trade then,
humans ___6___ young and
eagle-eyed. But today's high-technology users who ___7___
data at the computer console, and live to a ripe old age, ___8___
at an anatomical disadvantage. It is usual to stay up after dark
___9___ over computer and TV
screens, and reading when the eyes ___10___
be resting. Presbyopia, however is not ___11___
as a disease. Since it happens to everybody even at increasingly
younger ages, it is ___12___
'normal'. Scientists, many of whom wear glasses, ___13___
rather calm about the phenomena. Others, however, are ___
14___ by the trend. When
presbyopia first strikes, it appears as a mild ___15___
. The degradation is however, rapid. |