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2017 ; 10
(8
): 1261-1267
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Role of short-wavelength filtering lenses in delaying myopia progression and
amelioration of asthenopia in juveniles
#MMPMID28861353
Zhao HL
; Jiang J
; Yu J
; Xu HM
Int J Ophthalmol
2017[]; 10
(8
): 1261-1267
PMID28861353
show ga
AIM: To evaluate the positive effects of blue-violet light filtering lenses in
delaying myopia and relieving asthenopia in juveniles. METHODS: Sixty ametropia
juveniles (aged range, 11-15y) were randomized into two groups: the test group
(30 children, 60 eyes), wearing blue-violet light filtering lenses; and the
control group (30 children, 60 eyes), wearing ordinary aspherical lenses.
Baseline refractive power of the affected eyes and axial length of the two groups
was recorded. After 1-year, the patients underwent contrast sensitivity (glare
and non-glare under bright and dark conditions), accommodation-related testing,
asthenopia questionnaire assessment, and adverse reaction questionnaire
assessment. RESULTS: After 1y of wearing the filtering lenses, changes in
refractive power and axial length were not significantly different between the
two groups (P>0.05). Under bright conditions, the contrast sensitivities at low
and medium-frequency grating (vision angles of 6.3°, 4.0°, and 2.5°) with glare
in the test group were significantly higher than in the control group (P<0.05),
while the contrast sensitivity at low-frequency grating (vision angles of 6.3°
and 4.0°) in the absence of glare in the test group was higher than in the
control group (P<0.05). Under glare and non-glare dark conditions, the contrast
sensitivities of various frequencies in the test group did not show significant
differences compared with those in the control group (P>0.05). In the test group,
the amplitude of accommodation, accommodative lag, and accommodative sensitivity
of patients wearing glasses for 6 and 12mo were significantly elevated (P<0.05),
while the asthenopia gratings were significantly decreased (P<0.05).
Nevertheless, in the control group, the amplitude of accommodation, accommodative
lag, and accommodative sensitivity after 12mo were not significantly altered
compared with baseline (P>0.05), and the asthenopia grating was not significantly
decreased (P>0.05). In addition, after wearing glasses for 6 to 12mo, the
asthenopia grating of patients in the test group decreased significantly compared
with the control group (P<0.05). At 12mo, the constituent ratio of adverse
reactions did not show significant difference between the two groups (P>0.05).
CONCLUSION: A 1-year follow-up reveal that compare with ordinary glasses,
short-wavelength filtering lenses (blue/violet-light filters) increase the low-
and medium-frequency contrast sensitivity under bright conditions and improved
accommodation. They effectively relieved asthenopia without severe adverse
reactions, suggesting potential for clinical application. However, no significant
advantages in terms of refractive power or axial length progression were found
compared with ordinary aspheric lenses.