[...Eye-Strain During Sleep

Many people complain that when they first wake up in the morning, they
are tired, that they have headaches, and that their sight is very
imperfect. Later on in the day their eyes feel better, and the vision
may become normal.

I have examined with the Ophthalmoscope the eyes of many people during
sleep and found much to my surprise, that most people strain much more
in their sleep than they ever do when they are awake. Of course,
people when unconscious of their acts during sleep, are not aware of
this eye-strain.

The prevention of eye-strain during sleep in usually a very difficult
matter. Some cases are benefited just before retiring by palming for
one-half hour or longer, or until they go to sleep while palming.
Others by practicing the long swing for fifteen minutes, have found
that the eye-strain becomes less. In some serious cases with imperfect
sight, when the eye-strain is not prevented by palming or the swing,
they are often materially benefited by shortening their hours of sleep
with the help of an alarm clock. One  patient had the alarm set for 3
a.m. He would then get out of bed and practice the long swing,
alternating with palming for an hour or longer with the result that he
slept the rest of the night very comfortably, and awoke the next
morning with little or no evidence of eye-strain during sleep.

Some people have told me that they have lessened their eye-strain
during sleep materially, by moderate muscular exercises for one-half
hour or longer. They find that they obtain the best results when the
exercise is continued, sufficiently long to produce muscular
fatigue. ...]