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Establishment of an Objective and Quantitative Design System for Shading Glasses

Confirmation of the basic theory of an objective quantitative shaded eyeglass design system for patients with photophobia and retinitis pigmentosa

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT1032200262
Enrollment
10
Registered
2020-12-23
Start date
2020-12-23
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Retinitis pigmentosa

Interventions

Sponsors

Miura Gen
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1) 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

Exclusion criteria

Exclusion criteria: 1) 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

Design outcomes

Primary

MeasureTime frame
contrast sensitivity measured using Pelli-Robson chart

Secondary

MeasureTime frame
1) 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)

Contacts

Public ContactGen Miura

Chiba university hospital

gmiura2@chiba-u.jp+81-43-222-7171

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026