Chromatic and Monochromatic Optical Aberrations After Corneal Refractive Surgery

Wrocław University of Science and Technology

Status: Unknown

Conditions: Refractive Errors; Aberration, Corneal Wavefront

Study type: Observational

Funder types: Other

Identifiers

NCT03893838

ST001.2018

Details and patient eligibility

About

Refractive surgeries can be divided into two distinct categories: 1) corneal surgeries (superficial and deep procedures) carried on the surface of the eye and 2) lens surgeries (phakic IOL, refractive lens exchange) - an intraocular intervention, performed in the anterior or posterior chamber or on the lens. In the proposed protocol focus is on the corneal refractive surgeries impact on monochromatic higher-order aberrations on the one hand and chromatic aberrations on the other. During the surgery in order to get the patient emmetropic, refractive surgery corrects optical defects by decreasing aberrations of lower orders ) simultaneously increases high-order aberrations (that is perceived by the patient as halo, glare or starburst). Informations about prevalence and causes of higher order aberrations after refractive surgery are numerous but there is no information about chromatic aberrations.

Enrollment: 100 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• patient after corneal refractive surgery at least for 4 months
• post surgical refraction within +/- 0.75 diopter of spherical and +/- 1.0 diopter of cylindrical error
• willing and able to understand and sign an informed consent form.

Exclusion criteria

• patient unable to participate in the study
• any corneal diseases, eyes trauma or systemic diseases history; keratoconus or tendency of keratoconus
• corneal macula and obvious pannus; current enrolment in another clinical trial/research project

Trial design

100 participants in 3 patient groups

Post refractive surgery without HOA

Description:

Patients post refractive surgery that do not complain on the high order aberrations such as glare, halo and starburst.

Post refractive surgery with HOA

Description:

Patients post refractive surgery that do complain on the high order aberrations such as glare, halo and starburst.

Post refractive surgery with rainbow HOA

Description:

Patients post refractive surgery that do complain on: 1. the high order aberrations such as glare, halo and starburst but with the chromatic aureola 2. difficulties working with LCD projectors, monitors, cell phones and tablets