Heads-Up 3D Surgery under Low Light Intensity Conditions: New High-Sensitivity HD Camera for Ophthalmological Microscopes.

Purpose: To determine the feasibility of performing intraocular surgeries in a heads-up position with low illuminance conditions by observing a display of the surgical field created by a three-dimensional imaging (3D) system.

Methods: Seventy-four eyes of 56 patients underwent cataract surgery (72 eyes) with the heads-up 3D surgery system; 60 eyes with cataract surgery alone, 7 eyes with combined cataract and glaucoma microdevice implant surgery, 5 eyes with combined cataract and vitrectomy surgery, and two eyes with vitrectomy surgery alone were studied. The illuminance from the surgical microscope was set to be dimmer (Leica M822F40 main light 2%; otto-flex 6%) than the usual setting to minimize the discomfort and glare for the patient.

Utility Of Three-Dimensional Heads-Up Surgery In Cataract And Minimally Invasive Glaucoma Surgeries.

Purpose: This study aimed to assess the utility of the three-dimensional (3D) heads-up visualization system for minimal incision cataract surgery (MICS) and minimally invasive glaucoma surgeries (MIGSs).

Methods: Toric intraocular lens (IOL) implantation with phacoemulsification and trabecular microbypass stent implantation in patients with cataract and open-angle glaucoma were performed using the heads-up 3D visualization system combined with surgical navigation rather than the conventional microscope.

Results: This procedure was found to have the following advantages: the ability to clearly observe the anterior chamber angle image without requiring frequent focus adjustment owing to the extended depth of field and emphasized stereoscopic effect provided by this system and maintain the surgeon's posture.

Combined use of high-reflective index vitrectomy meniscus contact lens and a noncontact wide-angle viewing system in vitreous surgery.

Background: The aim of this study was to assess the combined use of a high-reflective index vitrectomy (HHV) meniscus contact lens and a noncontact wide-angle viewing system in vitreous surgery.

Methods: Twenty-three gauge vitrectomy was performed with combined use of a HHV meniscus contact lens and a noncontact wide-angle viewing system. When delicate manipulation of the retina such as internal limiting membrane peeling was performed, only the HHV meniscus lens was used.

Unexplained postoperative retinal hemorrhage after 23-gauge sutureless vitrectomy.

We report five cases of unexplained retinal hemorrhage after 23-gauge sutureless vitrectomy. A 23-gauge sutureless vitrectomy was performed for four cases of macular holes (MH) and one case of macular hole retinal detachment (MHRD). Retinal hemorrhages were observed on the first day after surgery and disappeared within several months without leaving any recognizable damage.

Evaluation of a partial retinal surface tear by optical coherence tomography.

Differential diagnosis of retinal hemorrhage and partial tear of the retinal surface may be difficult in some cases. A 62-year-old woman was mistakenly followed-up for small retinal hemorrhages for more than 1 year. Blocked fluorescence specific to retinal hemorrhage was not observed by fluorescein angiography (FAG).

Analysis of backward falls caused by accelerated floor movements using a dummy.

This investigation used a standing dummy on slippery and non-slippery surfaces with accelerated movements of a floor to simulate falling backward events. The results revealed the duration of falling, head impact velocity, etc., which are valuable for guiding the development of personal protective equipment, such as wearable airbags.