INTRODUCTION This paper presents the problem of automatic measurement of the iridocorneal angle in tomographic images of the anterior segment of the eye. It includes the results of the comparison of well-known methods for measuring the iridocorneal angle with new methods, proposed in this paper. All these methods concern tomographic image analysis and processing. MATERIAL AND METHOD In total,...

PURPOSE To determine if the use of pigments or adding polyvinyl pyrrolidone during the fabrication of 1-DAY ACUVUE DEFINE (AD) brand contact lenses impacts open-eye corneal swelling compared with no lens wear (NLW). METHODS A partial double-masked, randomized, bilateral crossover study was conducted in 24 Asian subjects using AD, 1-DAY ACUVUE DEFINE with Lacreon (ADL), NLW, and a control lens...

AIM To assess lens thickness measurements with anterior segment-optical coherence tomography (AS-OCT) in comparison with A-scan ultrasonography (A-scan US). METHODS There were 218 adult subjects (218 eyes) aged 59.2±9.2y enrolled in this prospective cross-sectional study. Forty-three eyes had open angles and 175 eyes had narrow angles. Routine ophthalmic exam was performed and nuclear opacity...

To the Editor: Flap creation is the most crucial step of LASIK and the introduction of the femtosecond laser led to the production of uniform flaps enhancing the accuracy and reproducibility of LASIK.1,2 However, intrastromal corneal opacity (such as scar and haze) raised controversies regarding the efficacy of the technique in such cases because it can interfere with laser tissue disruption, c...

AIMS To report and compare the cap thickness predictability of small incision lenticule extraction (SMILE) and flap thickness of femtosecond laser-assisted in situ keratomileusis (femto-LASIK). SETTINGS AND DESIGN Beyoglu Eye Training and Research Hospital, Refractive Surgery Department, Istanbul, Turkey. Retrospective pilot study. MATERIALS AND METHODS Medical records of patients who had S...

Anterior segment optical coherent tomography (AS-OCT, Visante; Zeiss) is used to examine meridional variation in anterior scleral thickness (AST) and its association with refractive error, ethnicity and gender. Scleral cross-sections of 74 individuals (28 males; 46 females; aged between 18-40 years (27.7±5.3)) were sampled twice in random order in 8 meridians: [superior (S), inferior (I), nasal...

The phakic refractive lens (PRL) is a silicone lens implanted into the posterior chamber to correct myopia and hyperopia. At the beginning of 2002, when the PRL was introduced at St. Erik Eye Hospital, there had been no reports published on this lens model and therefore the pilot studies of myopic and hyperopic eyes were conducted to investigate the surgical outcome. In the first study, the fir...

We reviewed a series of recently published studies in which the anterior chamber depth (ACD) distance was measured by Pentacam or Pentacam HR and compared with other measuring devices. Since some published studies reach contradictory conclusions regarding device interchangeability and include di erent ocular conditions, for instance, phakic eyes, pseudophakic eyes, cataractous eye, and so on, t...

BACKGROUND First reported study to assess the effect of diurnal variation on anterior chamber angle measurements, as well as, to re-test the effects of lighting and angle-of-incidence variation on anterior chamber angle (ACA) measurements acquired by time-domain anterior segment optical coherence tomography (AS-OCT). METHODS A total of 30 eyes from 15 healthy, normal subjects underwent anteri...