A Randomised intra-patient Comparision of toric Intraocular lenses
Research type
Research Study
Full title
A Randomised Intra-patient Comparision of Closed Loop and Plate Haptic Toric, Aspheric Aberration Neutral Hydrophilic Acrylic Intraouclar Lenses in Patients with Bilateral Astigmatism
IRAS ID
168791
Contact name
Phillip Buckhurst
Contact email
Sponsor organisation
Plymouth University
Clinicaltrials.gov Identifier
Duration of Study in the UK
2 years, 0 months, 1 days
Research summary
Cataracts are the most common cause of low vision and blindness in the world and cataract surgery is the single most commonly performed surgery in the world today. Cataract surgery is also known as phacoemulsification and involves the extraction of the natural lens from its capsular bag and implantation of an artificial intraocular lens (IOL). At the time of surgery around 19-22% of the total population has over 1.50DC of corneal astigmatism. It has been found that as little as 1.00DC astigmatism reduces unaided vision for most tasks Uncorrected astigmatism reduces visual acuity and increases spectacle dependence; this can reduce quality of life[7] and increase overall economic costs.[8]
Toric IOLs promise a stable correction of astigmatism for cataract patients as long as the IOL is correctly positioned and does not rotate.
To date no study has examined the rotational stability of either the Rayner T-flex Aspheric Toric IOL or the AT TORBI aspheric IOL using objective image analysis compensating for eye torsion.
The purpose of this study is to examine and compare the rotational stability, visual function and prevalence of post operative complications following contra-lateral implantation of the Rayner T-flex Aspheric Toric IOL and the Zeiss AT TORBI toric IOL.REC name
South West - Cornwall & Plymouth Research Ethics Committee
REC reference
15/SW/0025
Date of REC Opinion
27 Mar 2015
REC opinion
Further Information Favourable Opinion