Central corneal thickness measurements with partial coherence interferometry, ultrasound, and the Orbscan system.

Objective: To compare the reliability of central corneal thickness measurements (CCT) obtained with partial coherence interferometry (PCI), ultrasound pachymetry, and the Orbscan system.

Design: Cross-sectional study.

Participants: Twenty healthy subjects with CCT measurements in both eyes.

Twelve hour reproducibility of choroidal blood flow parameters in healthy subjects.

Aims/background: To investigate the reproducibility and potential diurnal variation of choroidal blood flow parameters in healthy subjects over a period of 12 hours.

Methods: The choroidal blood flow parameters of 16 healthy non-smoking subjects were measured at five time points during the day (8:00, 11:00, 14:00, 17:00, and 20:00). Outcome parameters were pulsatile ocular blood flow as assessed by pneumotonometry, fundus pulsation amplitude as assessed by laser interferometry, blood velocities in the opthalmic and posterior ciliary arteries as assessed by colour Doppler imaging, and choroidal blood flow, volume, and velocity as assessed by fundus camera based laser Doppler flowmetry.

Effect of accommodation and pupil size on the movement of a posterior chamber lens in the phakic eye.

Purpose: Although a posterior chamber phakic intraocular lens provides effective refractive correction of high myopia and hyperopia, mechanical contact between the implantable contact lens (ICL) and the crystalline lens and inadequate aqueous circulation in the prelenticular space could cause subcapsular opacification. To assess whether and to what extent such mechanical contact occurs, changes in the distance between the STAAR Collamer ICL and the crystalline lens under various conditions were investigated.

Design: Open pilot study.

Effect of optic edge design and haptic angulation on postoperative intraocular lens position change.

Purpose: To assess the effect of optic edge design and optic-haptic angulation of open-loop intraocular lenses (IOLs) on postoperative axial movement and the final position of the optic by measuring the anterior chamber depth (ACD) during the first postoperative year using partial coherence interferometry (PCI).

Setting: Department of Ophthalmology, Vienna General Hospital, Institute of Medical Physics, University of Vienna, Vienna, Austria.

Methods: In study 1, a 3-piece silicone IOL with nonangulated modified C-loop haptics (MicroSil, Dr.

Early objective assessment of intraocular inflammation after phacoemulsification cataract surgery.

Purpose: To evaluate the time course of blood-aqueous barrier (BAB) disturbance in the early period after small-incision cataract surgery.

Setting: Department of Ophthalmology, Vienna University, Vienna, Austria.

Methods: In a prospective study, 15 eyes of 15 patients with age-related cataract had small-incision cataract surgery by phacoemulsification with intraocular lens implantation.