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JAPANESE
国立保健医療科学院
JRCT ID: jRCT1032200262

Registered date:23/12/2020

Establishment of an Objective and Quantitative Design System for Shading Glasses

Basic Information

Recruitment status Recruiting
Health condition(s) or Problem(s) studiedRetinitis pigmentosa
Date of first enrollment23/12/2020
Target sample size10
Countries of recruitmentJapan
Study typeInterventional
Intervention(s)measure the contrast sensitivity by Pelli-Robson chart for the subjects wearing the colored filter lenses selected based on the basic theory

Outcome(s)

Primary Outcomecontrast sensitivity measured using Pelli-Robson chart
Secondary Outcome1) logMAR visual acuity 2) Ellipsoid zone length 3) Mean retinal sensitivity of central 4 points and mean deviation value of Humphrey visual field analyzer 10-2 program 4) Contrast visual acuity 5) 17-item Utah Photophobia Symptom Impact Scale(UPSIS-17)

Key inclusion & exclusion criteria

Age minimum>= 20age old
Age maximum<= 80age old
GenderBoth
Include criteria1) patients with retinitis pigmentosa, 20 years of age or more and under 80 years of age at the time of obtaining informed concent 2) patients with decimal visual acuity of 0.1 or more 3) patients who have used colored filter lenses to reduce photophobia
Exclude criteria1) patiens with complications as follows: macular disease with vitreous macular traction syndrome/macular edema/epiretinal membrane/severe myopia with macular legions, diabetic retinopathy, inflamation of external eye/infection/severe dry eye, occlusion of retinal artery, posterior ischemic optic neuropathy, history of optic nerve disease, nuclear cataract (Grade 3 or higher by Emery clasification), pre-subcapsular cataract or posterior subcapsular cataract seriously affecting the vision 2) patients who the Principal Investigator or the investigating doctors judging inappropriate for participation in this trial

Related Information

Contact

Public contact
Name Gen Miura
Address 1-8-1 Inohana Chuo-ku Chiba-shi Chiba Japan Chiba Japan 260-8677
Telephone +81-43-222-7171
E-mail gmiura2@chiba-u.jp
Affiliation Chiba university hospital
Scientific contact
Name Gen Miura
Address 1-8-1 Inohana Chuo-ku Chiba-shi Chiba Japan Chiba Japan 260-8677
Telephone +81-43-222-7171
E-mail gmiura2@chiba-u.jp
Affiliation Chiba university hospital