Measuring the Changes of the Intraocular Pressure After Corneal Laser Refractive Surgery Using Different Techniques

NCT07549815 | Not Yet Recruiting

• 1 other identifier: 36264PR1310100/12/25
• Study Type: interventional
• Target: 50
• Locations: 1 country
• Sites: 1

Brief Summary

To evaluate the changes that occur in the intraocular pressure after corneal refractive surgery either PRK , LASIK and femtosecond laser by using Corvis CT results and applanation tonometer

Conditions

Intraocular Pressure; Refractive Surgery

Outcome Measures

Primary Outcomes (1)

• Measuring intraocular pressure

  Intraocular pressure will be measured by in mmHg and by two methods : Corvis CT and applanation tonometer for each patient and will be recorded

  -The data collected will be before that laser surgery and one month after surgery

Study Arms (1)

Measuring intraocular pressure by using different techniques

EXPERIMENTAL

Other: Corvis machine

Interventions

Corvis machine OTHER

Measuring intraocular pressure by different methods and compare the results

Measuring intraocular pressure by using different techniques

Eligibility Criteria

• Age: 19 Years - 35 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64)

You may qualify if:

• Age between 19 and 35 years old
• Myopia range from (-2.00 to -6.00 Diopter) .

You may not qualify if:

• Kertoconus.
• Corneal scarring.
• Previous corneal infections.
• Minimum corneal thickness at the thinnest location less than 400 µm.
• History of uveitis or ocular allergy.
• Pre-existing glaucoma.

Sponsors & Collaborators

• Tanta University: lead

Study Sites (1)

Tanta Univeristy Hospital

Tanta, 31515, Egypt

Location

Related Publications (1)

• 1. Bailey MD, Zadnik K (2007) Outcomes of LASIK for myopia with FDA-approved lasers. Cornea 26(3):246-254 2. Sridhar MS, Rao SK, Vajpayee RB, Aasuri MK, Hannush S, Sinha R (2002) Complications of laser-in situ-ker- atomileusis. Indian J Ophthalmol 50(4):265-282 3. Mohammadi SF, Nabovati P, Mirzajani A, Ashrafi E, Vakilian B (2015) Risk factors of regression and under- correction in photorefractive keratectomy: a case-control study. Int J Ophthalmol 18;8(5): 933-937 4. Diakonis VF, Kankariya VP, Kymionis GD, Kounis G, Kontadakis G, Gkenos E, Grentzelos MA, Hajithanasis G, Yoo SH, Pallikaris IG (2014) Long term followup of pho- torefractive keratectomy with adjuvant use of mitomycin C. J Ophthalmol 2014:821920 5- dos Santos AM, Torricelli AA, Marino GK, Garcia R, Netto MV, Bechara SJ, Wilson SE. Femtosecond Laser-Assisted LASIK Flap Complications. J Refract Surg. 2016 Jan;32(1):52-9 6- Wang LK, Tian L and Zheng YP. Determining in vivo elasticity and viscosity with dynamic Scheimpflug imaging analysis in keratoconic and healthy eyes. J Biophotonics, 2016; 9: 454-463. 7.ConsejoA,MelcerT,RozemaJJ.Introductiontomachinelearningforophthalmologists.SeminOphthalmol.2019;34(1):19 _41.

  RESULT

Central Study Contacts

Dina Tadros, Ass Professor of Ophthalmology

CONTACT

+201224093354; dina.tadros@med.tanta.edu.eg

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NA
• Masking: NONE
• Purpose: DIAGNOSTIC
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Ass Professor of ophthalmology, Tanta University Hospital

Study Record Dates

• First Submitted: January 17, 2026
• First Posted: April 24, 2026
• Study Start: April 20, 2026
• Primary Completion (Estimated): October 20, 2026
• Study Completion (Estimated): January 16, 2027
• Last Updated: April 24, 2026

Record last verified: 2026-03

Data Sharing

• IPD Sharing: Will share

Locations

EG (1)