You searched for "Refraction"

2322 results found

Principles of contact lens fitting in keratoconus

Keratoconus is an ectatic condition of the cornea characterised by progressive conical distortion with irregular astigmatism, myopia and apical protrusion. Most cases progress slowly resulting in varying degrees of myopic astigmatism. Management of keratoconus includes spectacles, soft contact lenses, a...

LASEK with mitomycin C to correct myopia in thin corneas

This study evaluated the long-term outcomes of laser-assisted subepithelial keratomileusis (LASEK) with intraoperative use of mitomycin C (MMC) performed on thin corneas for the correction of myopia. MMC modulates the corneal wound healing response in surface healing, thus reducing the...

Blame the lens – not its position – in refractive surprise

Aetiology of postoperative refractive surprise Weber coined the term “wrong eye, wrong intraocular lens, wrong patient” in 2008 as an aide memoir of major factors believed to underlie refractive surprise – defined as a significant unintended difference between dioptric refraction...

Advances in the understanding, diagnostic and treatment of keratoconus

*Joint first authors Keratoconus is a bilateral and asymmetric eye condition in which the cornea’s structure is affected and thinned, causing a cone-shaped bulge to develop. This results in progressive loss of vision and impairs the ability of the eye...

Prostaglandin-associated periorbitopathy

This is a masked study of 33 patients who had been taking a prostaglandin analogue in one eye only for at least a year, to look for signs of prostaglandin-associated periorbitopathy (PAP). The investigators devised a new grading system to...

Surgical complications of ReLEx

Femtosecond laser refractive lenticule extraction (ReLEx) is a novel procedure for treatment of myopia and myopic astigmatism, which eliminates the use of microkeratome and excimer laser. Currently there are two techniques: FLEx – femtosecond lenticule extraction (similar to conventional LASIK)...

Retreatment of myopic LASIK with femtosecond and custom ablation

The purpose of this study was to identify the risk factors for retreatment post laser in situ keratomileusis (LASIK). A retrospective chart review was carried out for a four-year period and all patients who had undergone LASIK at the Boston...

Recession and resection surgery in TED

The aim was to investigate changes in ocular ductions in thyroid eye disease (TED) patients undergoing recession in comparison to recession / resection surgery. This was a retrospective study of 119 patients with inclusion of 102 eyes in final analysis....

Ophthalmology

The textbook is a large, single volume that ideally needs to be desk or table-supported, as its sheer weight makes it virtually impossible to rest comfortably on ones lap. The book is compiled by its two lead authors and editors...

Anisometropia following cataract surgery and its non-surgical treatment

The desired result of cataract surgery is improved visual acuity without the use of spectacles. In practice most patients following initial cataract extraction are likely to be symptomatic of anisometropia giving rise to prismatic effects (anisophoria) and unequal retinal image...

Iranian values for childhood convergence

The authors aimed to determine near point of convergence (NPC) values in a population-based study in Iranian schoolchildren with a large sample size. They explored its relation to factors such as age, gender, refractive error and near point of accommodation....

Early refractive correction promotes esotropia control

This study sought to determine the incidence and characteristics of esotropia in a Northern Ireland population of children <7 years old in a one-year period. The authors report a 2013 cohort in which the area catchment had 29,365 children under...