The influence of myopia on visual field changes in patients with and without glaucoma
Journal
Mакедонски медицински преглед = Macedonian medical review
Date Issued
2020
Author(s)
DOI
https://mld.mk/wp-content/uploads/2021/03/MMP202074(3).pdf
Abstract
Introduction. Glaucoma, one of the leading causes of
irreversible blindness in the elderly population world-
wide, is a progressive optic neuropathy. Myopia or near
sightedness is a refractive anomaly in which parallel rays
of light coming from a distance after refraction through
the cornea and lens focus in front of the retina in the
vitreous and then in a state of divergence create scatte-
red circles on the retina. The visual field is a projection
of the functional part of the retina in space, i.e. a pro-
jection of all retinal points at which visible sensations
can begin. If there is a damage to the nerve fibers of the
retina, a decrease or absence of sensitivity to identical
stimuli is manifested by defects in the visual field.
Methods. The study included 100 patients, who were
divided into two groups: one group with glaucoma and
another group without glaucoma. Regarding the degree
of myopia, all subjects (with and without glaucoma) were
divided into 3 groups: Low from-1Diopt to-3Diopt, Me-
dium from -3 Diopt to -6 Diopt and High>-6 Diopt. A
visual field was made in each patient.
Results. The cross tabulation showed in the examined
group (glaucoma) and the control group (no glaucoma)
for Fisher's Exact Test=28.920 and p<0.001 (p=0.000)
/Monte Carlo Exact Sig. (2-sided)/0.000-0.000/. There
was a significant difference between the two groups in
terms of visual field (finding). For Fisher's Exact Test
=31,157 ip <0.001 (p=0.000)/MonteCarloSig. (2-sided)
/0.000-0.001 in the performed cross tabulation between
the height of myopia and the degree of changes in the
visual field, there was a significant difference.
Conclusion. There was a significant difference shown
in the performed cross tabulation between the height of
myopia and the degree of changes in the visual field.
irreversible blindness in the elderly population world-
wide, is a progressive optic neuropathy. Myopia or near
sightedness is a refractive anomaly in which parallel rays
of light coming from a distance after refraction through
the cornea and lens focus in front of the retina in the
vitreous and then in a state of divergence create scatte-
red circles on the retina. The visual field is a projection
of the functional part of the retina in space, i.e. a pro-
jection of all retinal points at which visible sensations
can begin. If there is a damage to the nerve fibers of the
retina, a decrease or absence of sensitivity to identical
stimuli is manifested by defects in the visual field.
Methods. The study included 100 patients, who were
divided into two groups: one group with glaucoma and
another group without glaucoma. Regarding the degree
of myopia, all subjects (with and without glaucoma) were
divided into 3 groups: Low from-1Diopt to-3Diopt, Me-
dium from -3 Diopt to -6 Diopt and High>-6 Diopt. A
visual field was made in each patient.
Results. The cross tabulation showed in the examined
group (glaucoma) and the control group (no glaucoma)
for Fisher's Exact Test=28.920 and p<0.001 (p=0.000)
/Monte Carlo Exact Sig. (2-sided)/0.000-0.000/. There
was a significant difference between the two groups in
terms of visual field (finding). For Fisher's Exact Test
=31,157 ip <0.001 (p=0.000)/MonteCarloSig. (2-sided)
/0.000-0.001 in the performed cross tabulation between
the height of myopia and the degree of changes in the
visual field, there was a significant difference.
Conclusion. There was a significant difference shown
in the performed cross tabulation between the height of
myopia and the degree of changes in the visual field.
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