Repeatability of Choroidal Thickness Measurements in Healthy Subjects using RTVue XR Optical Coherence Tomography.

Purpose: To determine the intrasession, intraobserver, interobserver, and repeatability of choroidal thickness measurements in the healthy subjects imaged on enhanced depth imaging system of RTVue XR spectral domain optical coherence tomography (OCT).

Methods: In this prospective, cross-sectional study, seventy eyes of 70 healthy volunteers with no known ocular disease were imaged using high-density scanning protocol of RTVue XR OCT. In a single imaging session, three sequential 12 mm macular-enhanced depth horizontal line scans were obtained through the fovea.

Incidence of Glaucoma after Combined Descemet's Stripping Endothelial Keratoplasty and Retropupillary Fixated Iris-Claw Lens.

Purpose: To assess the incidence of glaucoma after combined Descemet's stripping endothelial keratoplasty (DSEK) and retropupillary fixated iris-claw intraocular lens (IOL) implantation in the patients with bullous keratopathy (BK) who required secondary IOL or IOL exchange.

Methods: In this retrospective case series, medical records of 22 patients who underwent combined DSEK and retropupillary fixated iris-claw IOL implantation were evaluated. Preoperative vision, intraocular pressure (IOP), postoperative IOP at different time periods, and intraoperative and postoperative complications were analyzed.

Effect of pupil size on posterior chamber phakic intraocular lens vault measurements.

Purpose: The aim of this study was to measure the implantable collamer lens (ICL) vault changes with anterior segment optical coherence tomography (AS-OCT) after the implantation of the Visian posterior chamber phakic ICL with a central hole (V4c) in relation to the pupil size.

Methods: This retrospective observational pilot study included 32 eyes of 16 patients, who underwent V4c ICL implantation. ICL vault was measured with AS-OCT in undilated and fully dilate state of the pupil.

Surgically induced astigmatism and refractive outcomes following phacotrabeculectomy.

Purpose: To objectively evaluate surgically induced astigmatism (SIA) after phacotrabeculectomy using keratometry and topography and to compare the magnitude of SIA and the refractive outcomes of single-site and twin-site phacotrabeculectomies.

Methods: Forty prospective subjects were enrolled in the study and were randomized into single-site and twin-site cohorts. SIA was objectively assessed using keratometry and Orbscan before and at three months after surgery.

Echographic study of extraocular muscle thickness in normal Indian population.

Purpose: To establish normative data of extraocular muscle (EOM) dimensions, both vertically and horizontally, using a reproducible echographic method in various age groups.

Methods: Two hundred eyes of 100 healthy subjects (50 males and rest females) were included in this prospective observational study. All subjects were divided into 5 groups with an interval of 10 years from 10 to 60 years.

Binocular vision of bilaterally pseudophakic eyes with induced astigmatism.

Purpose: Induced myopic astigmatism improves the monocular near logMAR (logarithm of the minimal angle of resolution) acuity of pseudophakes with monofocal intraocular lens implants but with a small loss in distance acuity. The impact of induced astigmatism on binocular vision of pseudophakes remains unknown. This study determined the impact of bilaterally induced astigmatism on binocular distance and near logMAR and stereoacuity of bilateral pseudophakes with monofocal intraocular lens implants.

Measurement of consensual accommodation in vision-impaired eyes.

Purpose: To measure the accommodative response in unsighted or profoundly vision impaired (PVI) eyes when accommodation is elicited in the fellow, sighted eye.

Methods: Eighty-eight unilaterally PVI subjects (UPS) and 97 bilaterally sighted subjects (BSS) (10 to 45 years) were enrolled. Subjects had clear ocular media for auto-refraction and could steadily fixate targets with the sighted eye.

Image quality analysis of pseudophakic eyes with uncorrected astigmatism.

Purpose: To determine the combined impact of uncorrected astigmatism, pupil diameter, and wavefront aberrations on the distance and near visual performance of pseudophakic eyes with monofocal intraocular lens (IOL) implants using objective image quality (IQ) metrics.

Methods: Monocular distance (4 m) and near (40 cm) logMAR acuities of 15 emmetropic pseudophakic eyes were obtained without astigmatism and with 2.5 diopters myopic to 2.

The precision of ophthalmic biometry using calipers.

Objective: The purpose of the study is to determine the precision of whole globe and cornea measurements acquired using calipers, and to quantify the intraoperator and interoperator variance.

Design: Experimental study.

Participants: Ten human donor eyes.

Relation between uncorrected astigmatism and visual acuity in pseudophakia.

PURPOSE.: The end point of astigmatic correction after cataract surgery will depend on how uncorrected astigmatism impacts distance and near vision of pseudophakic eyes. This study determined the impact of induced astigmatism and pupil size on the distance and near acuity of otherwise emmetropic pseudophakic eyes implanted with monofocal intraocular lenses.

Refractive surprise following implantation of correct powered intraocular lens--a real surprise!

We report a case of a 60-year-old male with unsatisfactory visual outcome following an uneventful phacoemulsification surgery for the left eye at our hospital. The evaluation of his anterior segment revealed a clear cornea, a well-positioned in-the-bag intraocular lens (IOL) and normal posterior segment. His vision in the left eye was 20/160 improving to 20/20 with +6.

Age-dependence of the optomechanical responses of ex vivo human lenses from India and the USA, and the force required to produce these in a lens stretcher: the similarity to in vivo disaccommodation.

The purpose of this study was to study the age-dependence of the optomechanical properties of human lenses during simulated disaccommodation in a mechanical lens stretcher, designed to determine accommodative forces as a function of stretch distance, to compare the results with in vivo disaccommodation and to examine whether differences exist between eyes harvested in the USA and India. Postmortem human eyes obtained in the USA (n=46, age=6-83 years) and India (n=91, age=1 day-85 years) were mounted in an optomechanical lens stretching system and dissected to expose the lens complete with its accommodating framework, including zonules, ciliary body, anterior vitreous and a segmented rim of sclera. Disaccommodation was simulated through radial stretching of the sectioned globe by 2mm in increments of 0.