r the use of dark glasses, and drops of
zinc sulphate (one grain in an ounce of water) three times a day, with
hourly dropping of boric acid (ten grains to the ounce of water)
constitute the ordinary treatment.

In inflammations with copious discharge of creamy pus, and great
swelling of the lids, the eyes should be washed out with the
boric-acid solution every half hour, and a solution of silver nitrate
(two grains to the ounce of water) dropped into the eye, once daily,
followed immediately by a weak solution of common salt in water to
neutralize the nitrate of silver, after its action has been secured.
The constant use of ice cloths, already mentioned, forms a necessary
adjunct to treatment. The sound eye must be protected from the chance
of contagion, arising from a possible infection from the pus
discharging from its mate. This may be secured by bandaging the well
eye, or, better, by covering it with a watch crystal kept in place by
surgeon's plaster.

In treating sore eyes with discharge, in babies, the infant should be
held in the lap with its head backward and inclined toward the side of
the sore eye, so that in washing the eye no discharge will flow into
the sound eye. The boric acid may then be dropped from a medicine
dropper, or applied upon a little wad of absorbent cotton, to the
inner corner of the eye, while the eyelids are held apart.

Hemorrhages occurring under the conjunctiva (or membrane lining the
inner surface of the lids and covering the front surface of the
eyeball) may be caused by blows or other injury to the eye, by violent
coughing, by straining, etc. Dark-red spots may appear in the white of
the eyeball, slightly raised above the surface, which are little blood
clots under the conjunctival membrane. No special trouble results and
there is nothing to be done except to wait till the blood is absorbed,
which will happen in time. If the eyes water, solution of zinc
sulphate (one grain to the ounce of water) may be dropped into the
eye, twice daily. Hot applications are beneficial here to promote
absorption of the clot.

=EYE-STRAIN.=--Eye-strain is commonly due to either astigmatism,
nearsightedness, farsightedness, or weakness of the eye muscles. The
farsighted eye is one in which parallel rays entering the eye, as from
a distance, come to a focus behind the retina. The retina is the
sensitive area for receiving light impressions in the back of the
eyeball. Sight is really a brain functi