Effect of methods of myopia correction on visual acuity, contrast sensitivity, and depth of focus.

Purpose: To psychophysically measure spherical and irregular aberrations in patients with various types of myopia correction.

Setting: Laboratory of Experimental Ophthalmology, University of Groningen, Groningen, The Netherlands.

Methods: Three groups of patients with low myopia correction (spectacles, soft contact lens, and Intacs) and 4 groups with high myopia correction (spectacles, rigid contact lens, Artisan claw lens, and laser in situ keratomileusis [LASIK]) had through-focus contrast sensitivity measurements to establish the myopic shift and depth of focus.

Effect of intraocular lens implantation on visual acuity, contrast sensitivity, and depth of focus.

Purpose: To determine the role of spherical and irregular aberrations in the optics of the natural eye and after intraocular lens (IOL) implantation in terms of visual acuity, contrast sensitivity, and depth of focus.

Setting: Laboratory of Experimental Ophthalmology, University of Groningen, Groningen, The Netherlands.

Methods: Visual acuity and defocus-specific contrast sensitivity in 11 pseudophakic patients (IOL group) and 27 age-matched phakic subjects were compared.