NCT04319497

Subjective and Objective Refraction in Pseudophakic Patients

Agreement and Variability of Subjective Refraction, Autorefraction, and Wavefront Aberrometry in Pseudophakic Patients

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 100 (actual)
• Sponsor: Vienna Institute for Research in Ocular Surgery · Academic / Other
• Sex: All
• Age: 21 Years – 105 Years
• Healthy volunteers: Not accepted

Summary

Targeting of post-cataract refraction depends mainly on the prediction of the post-operative lens position, but also on the post-operative refraction itself. Hence, aim of this study is to evaluate the agreement and variability of subjective refraction performed by two independent examiners, autorefraction, and wavefront aberrometry in pseudophakic patients after uneventful cataract surgery.

Detailed description

One of the main goals of modern cataract surgery, beside removing the cataractous lens, is to achieve the patient's desired post-operative refraction. Targeting this post-operative refraction depends mainly on the prediction of the post-operative lens position and the post-operative refraction itself. Reason for the contributing effect of post-operative refraction in the error-propagation analyses is that refraction in phakic patients was shown to have only moderate reproducibility. In the past, different studies evaluated refraction methods. However, there is no study that included reproducibility of subjective refraction in pseudophakic patients and compares it with objective refraction methods (autorefraction, wavefront aberrometry). 100 eyes of 100 patients, which underwent uneventful cataract surgery, will be included in the study. Refraction of one eye of each patient will be tested using subjective refraction by two different examiners, autorefraction, and wavefront aberrometry at two separate occasions.

Conditions

• Pseudophakia

Interventions

Type	Name	Description
DEVICE	Subjective refraction	Subjective refraction measurements will be performed by two testers for all the patients included
DEVICE	Autorefraction	Five autorefraction measurements will be performed for all the patients included
DEVICE	Wavefront aberrometry	Five wavefront measurements will be performed for all the patients included

Timeline

• Start date: 2013-03-20
• Primary completion: 2014-08-20
• Completion: 2014-08-20
• First posted: 2020-03-24
• Last updated: 2020-03-24

Locations

1 site across 1 country: Austria