Twin-City herald. [volume] (Minneapolis, Minn.) 1927-1940, 1937-04-10

siderable length of time. CD DIM
ness of vision coming on after much
use of the eyes ca Confusion of
lines of print. 60 Pain about the
eye. 60 Headache CD Drowsiness
or falling asleep while trying to con-
.tinue reading an hour or two, when
one has slept well the night before
90 An occasional trickle of tears
over the eyelashes while reading or
working. CD Itching of the margin
of the lids, G0) Burning sensation
about the eye and sometimes ed
ness along the margin of the IDS.
In addition to these local symptoms
noted about the eye itself, curious
reflex symptoms such as vertigo or
dizziness, sick stomach or nausea,
tWitching of the muscles of the face.
and even more profound nervous
symptoms such as neurasthenia or
even st. Vitus's Dance (chorea), may
occasionally be noted after consid-
cradle use of the eyes.
Eye strain is most frequent where
the eyeball is so short that accurate
focus does not occur on the retina
without muscle action. The interior
eye muscles of such an eye must
change the shape of the lens for good
distant vision and these muscles must
very materially change the shape of
the lens to give clear, sharp, close
vision. In this sort of eye, when open,
the interior muscles are always under
tension and with much close work
with continuous harder pulls on the
eye muscles, fatigue (eye strain) is
almost certain to occur. In this type
of short eyeball, wrongly referred to
as the far-siglted eye, fatigue symp-
toms (eye strain) rarely show until
the child begins to use his eyes a
great deal for near vision at play
or in school,
If, in addition to having too short
an eyeball, the front of the eyeball
is .irregularly curved SO that astigma-
tism is also present, the eye strain
is apt to show earlier in childhood
and with more severe symptoms, and
sometimes with associated inward
squint.
In either of these conditions or
with a combination Of the two, close
use of the eye early in life may lead
to serious over stretching Of the side
coats of the eyeball and the length
of the eyeban as it grows and
stretches, may pass over from one
that is too short to one that becomes
entirely too long, and with a ten
dency to become progressively longer.
The so-called far-sighted eye, in
such cases, changes over to become
the short-sighted eye and the eye
strain symptoms may become for
time less aggravated but with the ad-
ditional very grave danger that with
the ball Of the eye stretching too
much it will be impossible because
Of short-sight to secure good distant
vision. The vision of the over
stretched eye may be greatly limited.
Not only is loss of best vision likely
to occur in an eye handicapped by
long continued eye strain, but there
is great danger that such an eye
once it becomes a near-sighted eye,
and overstretched, may have serious
hemorrhages occur inside of the eye
ball or may suffer from detachment
of the retina, and serious loss of
vision from such loosening of the
retina.
To guard against eye strain means
to recognize it's early symptoms and
to seek competent medical advice SO
that the cause of the symptoms may
be clearly understood and, if they be
definitely due to eye strain, that suit
able lenses may be fitted to alleviate
undue pull on the inside eye muscles