You searched for "astigmatism"

221 results found

A look into the IOL space

Advances in the design and performance of intraocular lenses (IOLs) continue to be driven by demand for better outcomes, presbyopia correction and spectacle independence, alongside a better understanding of the dynamics of the crystalline lens, newer theories of accommodation and...

Influence of overall intraocular lens diameter on rotational stability

It has been shown that approximately one in three patients undergoing cataract surgery have >1.0D corneal astigmatism and managing this during surgery is important to achieve good refractive outcomes. One of the widely used ways of reducing preoperative astigmatism during...

Risk factors for amblyopia

The author presents a meta-analysis of published data to estimate American Association for Pediatric Ophthalmology and Strabismus (AAPOS) prevalence data for amblyopia risk factors. He extracted data from major paediatric comprehensive eye examination studies for children aged two to five...

XXII SARCS (State of the Art Refractive Cataract Surgery) Symposium 2024

by Andrew Bourne, BSc, MCOptom, DipTp(IP), Dip Glauc, Principal Optometrist, Hull & East Yorkshire Eye Hospital, UK. Once again, Milind Pande welcomed over 220 ophthalmologists and allied professionals to his annual symposium, this year held once again at the University...

Intraocular Lens Surgery

This book is a valuable update on understanding IOL surgery for ophthalmologists in training and in practice. Broadly, the book is divided into six sections dealing with three main concepts: 1) IOL selection for routine and complex scenarios; 2) IOL...

Characteristics of ptosis in Iranian children

A cross-section study was undertaken to determine the prevalence of ptosis (congenital and acquired) and its risk factors in Iranian children. The target population was children aged seven years in urban areas of Iran. Seventy schools of eight cities were...

Normal values with Orbscan IIz corneal topography

This study aimed to establish a database of normative measurements of corneal typography in children aged 5-15 years with the Orbscan IIz corneal topography system. They assessed 100 eyes of 100 children. The mean SimK astigmatism was 0.69±0.35D. The maximum...

Refractive changes after surgery

A long-term follow-up study was conducted to report power vector analysis of refractive astigmatic changes in a large group of 137 patients (250 eyes) undergoing horizontal strabismus surgery. Fifty-four percent were male. The average age was 9.22±8.21 years. Fifty-five percent...

Topography-guided photorefractive keratectomy in the treatment of corneal scarring

This study reports the outcome of topography-guided photorefractive keratectomy (TG-PRK) in the treatment of patients with corneal scarring. A retrospective case series including six eyes of six patients with corneal scarring and irregular astigmatism who underwent topography guided PRK. The...

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...

How does low-concentration atropine reduce progression of myopia?

This is a double-blind, randomised, placebo-controlled trial evaluating the effects of low-concentration atropine (0.05%, 0.025%, 0.01%) on ocular biometrics of myopic children. The aim is to determine what aspect of ocular biometrics low-concentration atropine influenced in reducing the progression of...

Scheimpflug imaging in paediatric glaucoma

The authors undertook this study to report the corneal tomographic characteristics of eyes that had surgery for controlled primary congenital glaucoma (PCG) compared to a control group. The study included 44 eyes of 27 children (18 males) having surgery for...