Evaluation of peripapillary choroidal vascularity index in young smokers.

This retrospective study aimed to compare the peripapillary choroidal vascularity index (CVI) between young smokers who smoked less than 5 packs/year and non-smokers. The study included 52 smokers and 67 non-smokers, and comprehensive eye examinations were performed on all participants. Axial lengths (AL) were measured, and peripapillary enhanced depth imaging optical coherence tomography (EDI-OCT) images were obtained and evaluated using the Open Source ImageJ software.

Compare of optic coherence tomography parameters in recreational synthetic tetrahydrocannabinol use and healthy control.

Purpose: To evaluate retinal thickness (RT), retinal nerve fiber layer thickness (RNFLT), and choroidal thickness (CT) changes in synthetic cannabinoid (SC) users.

Methods: This prospective study evaluated the RT, RNFLT, and CT values of 56 SC users and 58 healthy controls. The individuals using SCs were referred to us by our hospital's forensic medicine department.

Visual evoked potential changes following Botox administration in patients with blepharospasm.

Purpose: To examine visual evoked potential (VEP) changes following botulinum toxin type A (BTA) administration in patients with blepharospasm.

Methods: Patients diagnosed with blepharospasm receiving BTA administration were included in the study. Three groups, a control group and two study groups (patients examined 14 days after BTA administration-Study Group 1, and patients examined 28 days after BTA administration-Study Group 2) were evaluated.

Evaluation of xenon, light-emitting diode (LED) and halogen light toxicity on cultured retinal pigment epithelial cells.

Objective: To compare the possible toxic effects of three light sources used in vitreoretinal endoillumination systems; halogen, xenon, and light-emitting diode (LED) on retinal pigment epithelium (RPE) cell cultures, after two different exposure times.

Material And Methods: ARPE-19 human RPE cell cultures were exposed to halogen, xenon, and LED light sources at a distance of 1.5 cm for 30 and 60 min with equal lumen output levels.

Oxidant-Antioxidant Balance in the Aqueous Humor of Patients with Retinal Vein Occlusion.

Purpose: To analyze oxidative stress parameters in the aqueous humor with retinal vein occlusion.

Materials And Methods: A total of 56 patients who underwent cataract surgery were enrolled in this study. The eyes with retinal vein occlusion were included in the study group.

Angioid streaks in a case of Camurati-Engelmann disease.

Camurati-Engelmann disease (CED) is a rare autosomal dominant disease with various phenotypic expressions. The hallmark of the disease is bilateral symmetric diaphyseal hyperostosis of the long bones with progressive involvement of the metaphysis. Ocular manifestations occur rarely and mainly result from bony overgrowth of the orbit and optic canal stenosis.

A novel tool reflecting the role of oxidative stress in the cataracts: thiol/disulfide homeostasis.

We investigated serum and aqueous humor thiol/disulfide (T-D) homeostasis in patients with cataracts versus healthy controls. In total, 56 patients with cataracts and 49 healthy controls were enrolled in this case-control study. Serum total thiol (TT), native thiol (NT), and disulfide (DS) concentrations were determined using a novel automated measurement method.

The Choroid and Optical Coherence Tomography.

The choroid is the most vascular tissue in the eye and it plays an important role in the pathophysiology of various common chorioretinal diseases such as central serous retinopathy, age-related macular degeneration and degenerative myopia. Quantitative assessment of the choroid has been quite challenging with traditional imaging modalities such as indocyanine green angiography and ultrasonography due to limited resolution and repeatability. With the advent of optical coherence tomography (OCT) technology, detailed visualization of the choroid in vivo is now possible.