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Observational study to evaluate the effects of laser on accommodation, pupil size and contrast sensitivity

Panretinal photocoagulation induced alterations in accommodation, pupillary parameters and contrast sensitivity: A prospective study in patients with proliferative diabetic retinopathy - NIL

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
CTRI
Registry ID
CTRI/2025/07/091369
Enrollment
50
Registered
2025-07-22
Start date
Unknown
Completion date
Unknown
Last updated
2025-08-18

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

Conditions

Health Condition 1: E113- Type 2 diabetes mellitus with ophthalmic complications

Interventions

Intervention1: Nil: Nil Intervention2: Nil: Nil Intervention3: Nil: Nil Intervention4: Nil: Nil Intervention5: Nil: Nil

Sponsors

Sankara eye hospital, Shivamogga
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: 1 Eyes with proliferative diabetic retinopathy requiring panretinal photocoagulation 2 Patients willing to give consent for study and follow up 3 Eyes with pupils reacting to light

Exclusion criteria

Exclusion criteria: 1 Macular edema requiring anti-VEGF therapy 2 Eyes with pupillary abnormalities such as coloboma, iris atropy, rubeosis iridis, sectoral iris loss 3 Eyes with hazy media 4 Eyes with other retinal disorders or optic nerve damage 5 Eyes requiring surgery for advanced diabetic eye disease 6 Past history of cataract surgery 7 Eyes developing vitreous hemorrhage after PRP within 4 months 8 Eyes presenting with posterior synechiae 9 Eyes with non-reacting pupils 10 Eyes with traumatic mydriatic pupils 11 Eyes presenting with pseudoexfoliation syndrome 12 Eyes developing macular edema after PRP (even after 1 month or 1st PRP sitting) 13 Eyes undergoing any surgical interventions before or in between follow-up

Design outcomes

Primary

MeasureTime frame
1 To measure the change in pupil size in photopic, mesopic and scotopic illumination conditions after PRP 2 To measure the change in amplitude of accommodation and change in near point of accommodation following PRP 3 To measure the change in contrast sensitivity following PRP Timepoint: Recorded before 1st PRP sitting then follow-up 1 month and 3 month after completion of PRP.

Secondary

MeasureTime frame
NILTimepoint: NIL

Countries

India

Contacts

Public ContactDr Prajakta Pawar

Sankara eye hospital, Shivamogga

ravishankar@sankaraeye.com9880312124

Outcome results

None listed

Source: CTRI (via WHO ICTRP) · Data processed: Feb 4, 2026