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achieved versus predicted flap diameter using different sizes of contact glasses and their correlation with different corneal anatomical parameters in eyes undergoing lasik using visumax 800 femtosecond laser

achieved versus predicted flap diameter using different sizes of contact glasses and their correlation with keratometry and q value in eyes undergoing lasik using visumax 800 FS laser

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
CTRI
Registry ID
CTRI/2022/09/045287
Enrollment
100
Registered
2022-09-07
Start date
Unknown
Completion date
Unknown
Last updated
2022-10-17

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

Conditions

Health Condition 1: H522- Astigmatism Health Condition 2: H520- Hypermetropia Health Condition 3: H521- Myopia

Interventions

Intervention1: Visumax 800 Femtosecond laser: visumax 800 femtosecond laser is used to create corneal flap in patients undergoing cornea based refractive correction surgery Control Intervention1: flap

Sponsors

NIL
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: 1.myopic SE between -1 to -10D 2.hyperopic SE between +0.25 to +5D 3.Astigmatism from 0.75 to 5D

Exclusion criteria

Exclusion criteria: 1.keratoconus 2.pellucid marginal degeneration 3.suspect corneas 4.severe dry eyes 5.meibomian gland disease 6.glaucoma 7.retinal diseases 8.pregnancy 9.patient on immunosuppressants 10.patients with unassured follow-ups

Design outcomes

Primary

MeasureTime frame
1.flap diameter (mm) 2.flap depth 3.ease of flap seperation 4.OBL grading 5.steep keratometry(D) 6.mean keratometry(D) 7.maximum keratometry(D) 8.Q-value 9.white to white diameter(mm) 10.central corneal thickness(microns) 11.angle kappa(mm) Timepoint: PRE-operative steep keratometry(D) mean keratometry(D) maximum keratometry(D) Q-value white to white diameter(mm) central corneal thickness(microns) angle kappa(mm) INTRA-OPERATIVE Flap diameter ease of flap seperation OBL grading POST OPERATIVE DAY 1 AND DAY 15 Flap diameter flap depth steep keratometry(D) mean keratometry(D) maximum keratometry(D) Q-value white to white diameter(mm) central corneal thickness(microns) angle kappa(mm)—

Secondary

MeasureTime frame
1.visual acuity 2.manifest refraction and spherical equivalent 3.objective scatter index Timepoint: pre operative post operative day 1 and day 15—

Countries

India

Contacts

Public ContactDr Aditi Pai

Nethradhama superspeciality eye hospital

brar_sheetal@yahoo.co.in9591002092

Outcome results

None listed

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