Clinical trials: Ocular Refraction
Error, Refractive
Errors of Refraction Among Primary School Children
This study will include primary school children to evalute their refraction and follow those who will wear glasses to detect their compliance.
- Trial name
- NCT05366543
- Testing
- Visual acuity measurement
- Where
- Egypt
- Volunteers
- 150 people
- Sponsor
- Minia University
Refractive Errors
Cognitive Level Enhancement Through Vision Exams and Refraction
The investigators aim to conduct a mixed-method study in which a randomised controlled trial (RCT) and a descriptive qualitative study will be conducted.
- Trial name
- CLEVER (NCT05458323)
- Testing
- Free near and Distance Vision glasses
- Where
- India
- Volunteers
- 820 people
- Sponsor
- Queen's University, Belfast
Cataract, Pseudophakia
Evaluation Study for a Non-Contact Biometer
The purpose of this study is to determine whether a new non-contact biometer, is as accurate as the the available gold-standard.
- Conditions
- Cataract, Pseudophakia, Myopia, Hyperopia
- Trial name
- NCT00494390
- Where
- Switzerland
- Volunteers
- 95 people, healthy volunteers welcome
- Sponsor
- Insel Gruppe AG, University Hospital Bern
Myopia, Left Eye
Short Term Refractive and Ocular Parameter Changes After Topical Atropine
In order we had designed a prospective clinical trial. Spherical equivalent refractive error (SER), axial length (AL), mean keratometric value (Mean-K), anterior chamber depth (ACD), and intraocular pressure (IOP) were measured…
- Trial name
- NCT03839888
- Testing
- 0.125% Atropine
- Volunteers
- 96 people
- Sponsor
- Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation
Strabismus
Deep Neuromuscular Blockade in Strabismus Surgery
The purpose of this study is to determine if inducing a moderate or greater neuromuscular block (TOF count 0-3) when performing a neuromuscular block in pediatric patients aged 3 to 18 years undergoing strabismus surgery under…
- Trial name
- NCT05882643
- Testing
- moderate to deep neuromuscular blockade, shallow to minimal neuromuscular blockade
- Where
- South Korea
- Volunteers
- 201 people, healthy volunteers welcome
- Sponsor
- Seoul National University Hospital
Refractive Error Correction
SUBJECTIVE REFRACTION WITH LIGHTFIELD TECHNOLOGY
The aim of this study is to test whether it is possible in principle to determine defective vision using light field technology.
- Trial name
- NCT06583954
- Where
- 2 sites in Switzerland
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Daniela Nosch
Cataract
Cataract Online Refraction Evaluation: A Multi Center Randomized Controlled Trial
Background of the study: Cataract is widely prevalent in especially elderly and cataract extraction surgery has thus become one of the most performedsurgeries worldwide.
- Trial name
- CORE-RCT (NCT04809402)
- Testing
- remote monitoring after cataract surgery
- Where
- 6 sites in Austria, Germany and 1 more
- Volunteers
- 94 people
- Sponsor
- UMC Utrecht
Cornea, Refraction Error
Corneal Topography and High Order Aberrations in Regular Contraceptive Pills
Effect of regular usage of contraceptive pills on corneal topography and corneal high-order aberrations
- Trial name
- NCT07693673
- Testing
- Hormonal Contraception, Combined Oral Contraceptive (COC)
- Where
- Egypt
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Elshimaa A.Mateen
Cycloplegia, Refractive Errors
Cycloplegic Refraction in Pediatric Patients With Esotropia
The primary outcome of this study is to compare cyclopentolate 1% and tropicamide 1% for cycloplegic refractions in pediatric populations with esotropia.
- Conditions
- Cycloplegia, Refractive Errors, Esotropia, Vision Disorders
- Trial name
- NCT06077682
- Testing
- Cyclopentolate, Tropicamide
- Where
- 2 sites in Jordan, Qatar
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Islamic Hospital, Jordan
Pseudophakia
Subjective and Objective Refraction in Pseudophakic Patients
Targeting of post-cataract refraction depends mainly on the prediction of the post-operative lens position, but also on the post-operative refraction itself.
- Trial name
- NCT04319497
- Testing
- Subjective refraction, Autorefraction, Wavefront aberrometry
- Where
- Austria
- Volunteers
- 100 people
- Sponsor
- Vienna Institute for Research in Ocular Surgery
Refractive Errors
Efficacy and Safety of Astaxanthin in Volunteer With Refraction Errors
This study will investigate efficacy and safety of astaxanthin in 180 volunteers with refraction errors. Visual test, skin test, liver function test, renal function test, and adverse event will be evaluated before and after…
- Trial name
- NCT05009810
- Testing
- astaxanthin 4 mg, astaxanthin 6 mg
- Volunteers
- 180 people, healthy volunteers welcome
- Sponsor
- Chulalongkorn University