View clinical trials related to Astigmatism.
Filter by:To evaluate the short-term efficacy and safety of scleral contact lens in the clinical treatment of patients with irregular astigmatism after corneal transplantation by analyzing ocular parameters and ocular surface conditions of patients after corneal transplantation.
Evaluation, at least one-year long-term, of the clinical performance and safety of Mini Toric Ready Intraocular Lens (IOL), a monofocal toric intraocular lens.
The goal of this observational study is to learn about the difference of refractive outcomes between Artificial Intelligence and experienced surgeon predicting Nomogram assist SMILE surgical design and the influenced factors of refractive outcomes in patients who underwent Small Incision Lenticule Extraction(SMILE) at the Refractive Surgery Center of Tianjin Eye Hospital. The main questions it aims to answer are: - Compare the difference of refractive outcomes between Artificial Intelligence and experienced surgeon predicting Nomogram assist SMILE surgical design - Analysis the influenced factors of refractive outcomes
In modern cataract surgery, residual astigmatism continues to be one of the major factors influencing patients' visual quality and satisfaction. The goal of this study is to compare the clinical outcomes of femtosecond laser arcuate keratotomy in one eye and Toric intraocular lens implantation in the contralateral eye for astigmatism correction in patients undergoing femtosecond laser-assisted cataract surgery. The study is a prospective randomized comparative study. Patients with binocular regular corneal astigmatism ranging from 0.75 to 3.00 D will be recruited. The patient will randomly receive femtosecond laser arcuate keratotomy in one eye and receive Toric intraocular lens implantation in the contralateral eye. Long term evaluation will be performed to compare the visual acuity, subjective manifest refraction, and corneal topography between groups.
Compare manually performed Astigmatic Keratotomy to femtosecond laser astigmatic keratotomy to manage corneal astigmatism more than three diopters after phacoemulsification.
The purpose of this Post-Market Clinical Follow-up (PMCF) study is to describe the long-term safety and performance of the AcrySof PanOptix Trifocal toric and non-toric IOL models in subjects bilaterally implanted with these IOLs for 3 to 5 years. This study will be conducted in Spain.
Refractive errors and corneal astigmatism are associated with changes in angle kappa and corneal back elevation at the thinnest point in Pentacam. The purpose of this study is to track: The effect of anterior corneal astigmatism treatment on angle kappa and corneal back elevation.
The purpose of this study is to assess the clinical performance of TOTAL30 for Astigmatism (T30fA) soft contact lenses with Biofinity Toric soft contact lenses.
The purpose of this study is to report the prevalence data for total corneal astigmatism (TCA) in cataract surgery candidates.
Approximately 30 soft toric contact lens adapted subjects will be enrolled in this feasibility, bilateral, randomized, double-masked (subject and investigator), repeated measures insertion study. All subjects will be seen for a Screening/Dispensing Visit at which informed consent will be obtained and eligibility will be assessed. If subjects satisfy all eligibility criteria, subjects will be dispensed study lenses according to unique randomization tables that will be provided to each Investigator. If study eligibility is met, subjects will have lenses inserted in random, successive order. Subjects will be receiving each of the study lens types once, in a randomized order. The subject will wear each of the study contact lenses for approximately 10 minutes.