THE LOSS OF INFRARED LIGHT SENSITIVITY OF PHOTORECEPTOR CELLS MEASURED WITH TWO-PHOTON EXCITATION AS AN INDICATOR OF DIABETIC RETINOPATHY: A Pilot Study.

Purpose: Human photoreceptors are sensitive to infrared light (IR). This sensitivity can be used as a novel indicator of retinal function. Diabetic retinopathy patients were assessed using in vivo two-photon excitation and compared their scotopic IR threshold with that of healthy patients.

[Interactive training using a smartphone video retinoscope : Video article].

Background: The purpose of this project is to apply and optimize a conventional streak retinoscope connected to a smartphone in order to demonstrate and record retinoscopic techniques, related phenomena, typical examination errors in a standardized environment and to use this set-up to produce instructional video clips. The videos enhance and improve the trainer-trainee interaction by instantly visualizing the optical phenomena on the integrated monitor of the retinoscope.

Methods: A smartphone (iPhone 6, Apple, Cupertino, CA, USA) is reversibly connected to a Beta 200 streak retinoscope (HEINE, Herrsching, Germany) via a coupling plate.

[High resolution functional magnetic resonance tomography with Gd-DTPA eyedrops in diagnosis of lacrimal apparatus diseases].

Unlabelled: Both dacryocystography and dacryoscintigraphy are well established in the evaluation of stenoses of the lacrimal drainage system. They provide limited information about the ductal anatomy itself and about periductal structures. MR imaging was evaluated for its capability to directly visualize the lacrimal drainage system in detail and simultaneously provide functional characterization of dacryostenosis.

Combined phacoemulsification and filtering surgery with the 'no-stitch' technique.

Objective: To determine if intentionally making a radial incision could lead to a lasting decrease in intraocular pressure and the development of filtering blebs.

Methods: Forty-three eyes treated with combined filtering surgery were compared with a control group of 42 eyes treated with cataract surgery (phacoemulsification) alone. All of the patients had advanced chronic open-angle glaucoma.

Photovaporization rate and profile of an erbium-chromium:YAG laser in the fundamental mode.

Purpose: To evaluate the ablation characteristics of an experimental erbium:YAG (Er:YAG) laser and assess whether it delivers sufficient output for performing photorefractive keratectomy.

Setting: Department of Ophthalmology, Virchow-Clinics, Humboldt University, Berlin, Germany.

Methods: An experimental Er:YAG laser, the erbium-chromium:YAG, running in fundamental mode was used to evaluate the energy profile.