Many people will have slight inefficiencies within their visual system,
but be unaware that their vision or focussing has a potential weakness.
It
is not until that person becomes involved in a visually demanding task
that these latent problems become manifest. The 2 classic tasks that
do this are computers (VDU) and night driving.
The
VDU thus doesn't cause the deterioration, but can make you more aware
of any slight problems with your eyes. It is also important to remember
that the focusing system weakens with age. |
