purpose : to evaluate the accuracy of the two methods the clinical history method (chm), and the contact lens method (clm), in refractive corneal power determination and comparing the accuracy of srk ii, srk t and holladay ii (h ii) formulas for intraocular lens (iol) power calculation in patients who had laser in situ keratomileusis (lasik) surgery for myopia with or without astigmatism method...

Laser refractive surgery for myopia increases the eye's higher-order wavefront aberrations (HOA's). However, little is known about the impact of such optical degradation on post-operative image quality (IQ) of these eyes. This study determined the relation between HOA's and IQ parameters (peak IQ, dioptric focus that maximized IQ and depth of focus) derived from psychophysical (logMAR acuity) a...

With continued improvements in surgical techniques, biometry, and intraocular lens (IOL) technology, cataract surgeons have for some time been capable of consistently achieving highly accurate quantitative refractive results following cataract/lens replacement surgery. We know we can improve an individual’s vision from 20/400 to 20/20, for example. The modern cataract surgeon, however, is now e...

OBJECTIVE To assess the preoperative central corneal thickness (CCT) of myopic and/or astigmatism patients presenting for refractive surgery in a tertiary hospital in Yemen. METHODS In this hospital-based cross-sectional study, 2,304 subjects aged 18-50 years with myopia and myopic astigmatism who presented to the refractive surgery unit were recruited. Data for the current study was collecte...

OBJECTIVE Most procedures to treat refractive error are based on laser surgery, but other techniques are available. We review the relative advantages and the risk associated with the different surgical options. AREAS OF AGREEMENT Laser refractive surgery is now a safe and effective alternative to glasses or contact lenses. AREAS OF CONTROVERSY Because refractive surgery is an area of rapidl...

OBJECTIVES To report the occurrence of persistent diplopia manifesting after refractive surgery, to describe the different causes of this complication, to provide risk stratification for its occurrence, and to outline minimal screening techniques for its prevention. METHODS A retrospective medical record review of patients seen in 2 private strabismus practices who experienced persistent dipl...