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2015 ; 10
(4
): 429-32
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Quantity and Quality of Vision Using Tinted Filters in Patients with Low Vision
Due to Diabetic Retinopathy
#MMPMID27051488
Sadeghpour N
; Alishiri AA
; Ajudani R
; Khosravi MH
; Amiri MA
; Sadeghpour O
J Ophthalmic Vis Res
2015[Oct]; 10
(4
): 429-32
PMID27051488
show ga
PURPOSE: To investigate the effect of tinted filters on visual acuity (VA),
contrast sensitivity and patient satisfaction in diabetic retinopathy associated
with low vision. METHODS: In a prospective study, 51 patients with diabetic
retinopathy and low vision were assessed. We chose a simple random sampling
method and used the patient's files for data collection. LogMAR notations were
applied for assessing VA and a contrast sensitivity chart (CSV-1000) was employed
for measuring contrast sensitivity. First, measurements were performed without
tinted filters and then using them. Appropriate lenses were given to the patients
for 2 days, and they were questioned about their satisfaction using them in
different places. RESULTS: A total of 20 male and 31 female patients with mean
age of 57.3 years participated in the study. With a 527 ± 10 nm filter, mean VA
improved significantly (P ? 0.05). Using the 527 ± 10 nm and 511 ± 10 nm filters,
mean contrast sensitivity was improved significantly at 3 and 6 cycles/degree
frequencies (P < 0.05). The effect of other filters on VA and contrast
sensitivity was not significant. Patient satisfaction rate was generally high.
CONCLUSION: Tinted filters are able to rehabilitate low-vision patients due to
diabetic retinopathy. The 527 ± 10 and 511 ± 10 nm wavelength filters improved
contrast sensitivity and the 527 ± 10 nm filter improved VA to some extent.
Further investigations are recommended to assess the effect of these filters in
patients with other causes of low-vision.
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