YOUNGER ADULTS (UP TO
The new problems encountered in younger adults
are related mainly to over-use of the eyes,
physical injuries and environmental
irritants. Most people, who already would
have worn glasses in their school-age years,
would continue to be wearing glasses for the
particular tasks required.
At this age, the eyes are fully mature and can
be considered to be rather "set", as
they are no longer as plastic as in the previous
two age categories mentioned above. Hence
excessive close work will not induce as much
short-sightedness, and provided the diet is
adequate, the visual system tires less quickly
than before. This is not to say however that the
eyes can no longer adapt by becoming short-sighted,
or that they no longer fatigue to the extent
where blurred or double vision is noticed after
excessive close work. The interval between
examinations is usually greater for those people
in this age group than in any other age group.
This follows from the fact that the visual system
is more stable during these years.