Filler-induced blindness "seen" by ophthalmologists: Case presentation and treatment algorithm.

PURPOSE: Filler-induced blindness (FIB) is the most threatening complication following periocular injection. To date, no standard of care has been established. The goal of this study is to report a new case of FIB with partial visual recovery and present our personalized algorithm for treatment based on fluorescein angiography findings. MATERIALS AND METHODS: Case report with 24 months follow-up and treatment algorithm. RESULTS: Our patient experienced complete vision loss to no light perception following forehead lipofilling. Retinal angiography identified a posterior ciliary artery occlusion. Antiplatelet medication, steroids and intraocular pressure lowering medications were administrated, followed by hyperbaric oxygen treatment (HBOT). Visual acuity improved to +0.8 logMar. The HBOT treatment was monitored by fluorescein angiogram. Based on this case and on the ophthalmic literature on retinal and ciliary artery occlusion, we established a personalized FIB protocol guided by fluorescein angiography. CONCLUSION: Although prevention remains the best treatment, all physicians should be prepared to manage FIB. Prompt management at the office guided by written protocols, as well as emergency kits, are essential. In referral centers, personalized treatment should be undertaken based on fluorescein angiography findings.

Automated high precision secondary pH measurements.

A new setup for high precision, automated secondary pH measurements together with a reference measurement procedure has been developed and tested in interlaboratory comparisons using buffers pH 4.005, pH 7.000, and pH 10.012 at 25 °C and 37 °C. Using primary buffers as standards, a standard uncertainty in pH better than 0.005 can be reached. The central measuring device is a one piece, thermostatted cell of PFA (perfluoroalkoxy) with a built-in Hamilton(®) Single Pore™ Glass electrode. Due to its flow-through principle this device allows pH measurements with low consumption of measurement solutions. The very hydrophobic and smooth PFA as construction material facilitates complete emptying of the cell. Furthermore, the tempering unit affords very precise temperature control and hence contributes to the low target uncertainty of the produced secondary buffer solutions. Use of a symmetric measurement sequence and the two point calibration was sufficient to reach high precision and accuracy.