Contact lens correction of astigmatism is reviewed. According to literature data, rigid gas permeable lenses are the lenses of choice in correction of irregular and high astigmatism. The crucial advantage of rigid gas permeable lenses is clear vision and stable correction of astigmatism. Soft toric lenses ensure quick adaptation and comfort. The most prominent disadvantage of soft toric contact...

PURPOSE To evaluate the subjective performance of modern scleral lenses in patients of the clinics of Visser Contact Lens Practice. METHODS In this cross-sectional survey, all the necessary data were collected at the first follow-up visit during the 5-month study period. In accordance with the preformed fitting technique developed at Visser Contact Lens Practice, four types of scleral lenses ...

This 30-year-old patient had a high myopia and with-the-rule astigmatism. Her best-corrected-visual-acuity was 20/20 with -6.75 -2.50 x 10. cornea an asymmetric bowtie, we were concerned laser vision correction. We then decided to implant toric phakic intraocular lens (Visian ICL® toric) and, 1 week after surgery, she J1 uncorrected. Note the central anterior vaulting of away from crystalline l...

BACKGROUND This study aimed to investigate the clinical application of phakic toric intraocular collamer lens (TICL) implantation in treating ametropia following deep anterior lamellar keratoplasty (DALK) for patients with keratoconus, especially the effectiveness and safety of high astigmatism and indications of TICL implantation after corneal transplantation. METHODS Using the self-controll...

— We explain the main ideas and techniques involved in recent proofs of asymptotics of rational points of bounded height on toric varieties.

Abstract Background To assess the clinical outcomes of Visian Implantable Collamer Lens (ICL) with a central port throughout 7 years follow-up. Methods Eighty-four eyes 52 patients were evaluated over follow-up period after V4c ICL implantation. Uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction, intraocular pressure (IOP), endothelial cell density (ECD) vault analysed...