Astigmatism Clinical Trial
Official title:
Efficacy and Cost-effectiveness of Toric Intraocular Lenses in Correcting Astigmatism in Cataract Surgery: a Randomised Clinical Trial
The purpose of this study is to determine if Toric intraocular lens implantation in cataract surgery is a more efficient and cost-effective treatment of astigmatism than Monofocal intraocular lens implantation.
A recent innovation in cataract surgery consists of the introduction of toric intraocular
lenses (IOLs) that can correct corneal astigmatism. It offers the opportunity for patients
with substantial astigmatism to achieve optimal distance vision without using spectacles.
Good near vision may subsequently be achieved with low-cost reading glasses. The current
practice of non-toric IOL implantation in astigmatic patients warrants the use of expensive
bifocal or multifocal spectacles with cylinder correction to achieve good distance and near
vision.
Objective: The primary objective of this study is to compare spectacle independence for
distance vision following toric IOL implantation and monofocal intraocular lens (IOL)
implantation. The secondary objectives are to compare uncorrected distance vision, residual
refractive astigmatism, quality of vision, wavefront aberrations, contrast sensitivity,
complication profile, costs of postoperative spectacles and cost-effectiveness.
Study design: Multi-centre randomised clinical trial. Study population: 160 patients with
regular corneal astigmatism of at least 1.25 diopters in both eyes who require bilateral
cataract surgery.
Intervention: Cataract surgery with implantation of a toric IOL (AcrySof model SN60TT) or an
monofocal IOL (AcrySof model SN60AT).
;
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Treatment
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