To the Editor: Some patients with keratoconus have poor corrected distance visual acuity (CDVA) associated with high refractive errors. According to our treatment protocol,1 the best approach for these cases is intracorneal ring segments (ICRS) implantation (usually one segment) to improve CDVA followed by corneal collagen cross-linking (CXL) treatment 4 weeks later to stabilize the cornea and ...

Combined Posterior Phakic Intraocular Lens and SMILE in a Patient With High Myopia Bioptics is defined as a sequential method of treating large and complex refractive errors aiming to improve stability and predictability by the combination of refractive techniques with different mechanisms of action.1 The Visian Implantable Collamer Lens (ICL; STAAR Surgical, Monrovia, CA) is a foldable phakic ...

Trehalose is a non-reducing sugar that plays an important role in plant growth and development. To study the role of trehalose on lipid metabolism and gluconeogenesis, Arabidopsis thaliana wild type (WT) and TreF (a line expressing trehalase) were grown on ½ MS medium with or without 100 mM sucrose and or trehalose in light or continuous darkness. In dark, trehalose leads skotomorphoge...

PURPOSE To compare the efficacy and outcome of phakic toric implantable collamer lens (TICL) and refractive clear lens extraction with AcrySof Toric intraocular lens (TIOL) implantation for the treatment of myopic astigmatism. PATIENTS AND METHODS This study assessed eyes with myopic astigmatism >-1 D and ≤-4 D with a spherical equivalent >10 D or <10 D if the patients were unsuitable for cor...

To the Editor: We read with interest the article by Cakir and Utine1 regarding the results of combined intracorneal ring (KeraRing; Mediphacos Ltd, Belo Horizonte, Brazil) and anterior chamber, iris-fi xated, phakic intraocular lens (IOL) (Artisan/Artifl ex; Ophtec BV, Groningen, The Netherlands) implantation in patients with keratectasia, which appeared in the February 2011 issue of the Journa...

PURPOSE To compare the efficacy and rotational stability after implantation of two types of toric implantable collamer lenses (Toric ICL™(TICL);V4 and V4c, STAAR Surgical Co.). STUDY DESIGN Retrospective case series. METHODS This retrospective study evaluated total 48 eyes of 48 patients who underwent the implantation with V4 and V4c TICL with a central hole; A twenty-four eyes of 24 patien...

The improvements in excimer laser technology made hyperopic excimer refractive surgery a valuable option for hyperopia correction. However, despite the good visual and refractive outcomes of excimer laser photorefractive keratectomy (PRK) and laser in situ Keratomileusis (LASIK) treatments, they are more effective and stable for the correction of low degrees of hyperopia than high hyperopia1-7....

AIM: To elucidate the safety and visual quality of implantable collamer lens with central hole (ICL V4c) implantation for correcting moderate high myopia at least 5y. METHODS: This retrospective study was conducted on 58 patients (114 eyes) who were followed up 5y after ICL V4c implantation. The observation done before 1d, 1mo, 1 or more surgical procedure. acuity, subjective refraction, intrao...