purpose: to compare peripapillary retinal nerve fiber layer (rnfl) thickness among multiple sclerosis (ms) patients with or without a history of optic neuritis (on) and a healthy control group. methods: in this retrospective case-control study, 59 ms patients were recruited from a neurology clinic of imam hossein hospital. of which, 36 patients had at least one episode of on and 23 others had n...

In this study, we have studied the effects of temperature and X-ray energy variations on the light output signals from two different fiber-optic sensors, a fiber-optic dosimeter (FOD) based on a BCF-12 as a plastic scintillating fiber (PSF) and a fiber-optic thermometer (FOT) using a silver halide optical fiber as an infrared optical fiber (IR fiber). During X-ray beam irradiation, the scintill...

Optically Powered Fiber Optic Sensors (OPFOS) combine the advantages of fiber optic and microelectronic technologies [1-12]. Fiber optic and partially Fiber Optic Sensors (FOS) offer advantages that are significant in the field of variety of industrial, military and medical applications. FOS are immune to electromagnetic interference (EMI), they have low thermal and mechanical inertia, and they...

This article discusses distributed systems of fiber-optic sensors based on Bragg fiber gratings for monitoring and diagnosing the state building structures, which allow periodic measurements engineering assess trends in their technical condition thereby facilitate identification possible threats. The paper presents results experimental tests an optoelectronic system gratings. distribution defor...

Fiber-optic sensors have many advantages, including small size, light weight, immunity to electromagnetic interference, and the capability of remote sensing. Fiber-tip sensors are fabricated on a fiber tip and are the smallest type of fiber-optic sensor. The fiber-tip sensors have attracted a great deal of attention in past years for pressure, temperature, and acoustic sensing. In this thesis, ...

PURPOSE To describe optic disc variables assessed by evaluation of clinical optic disc photographs and to compare sensitivity and specificity of these optic disc parameters in identifying patients with ocular hypertension who have nerve fiber layer defects and normal visual fields and patients with visual field defects. METHODS The study included 500 normal subjects, 132 patients with ocular ...

Fiber-optic technology emerged originally for applications in data transmission and telecommunications. However, sensors based on fiber-optics have been developed rapidly because of their excellent sensing performances capability to function remote harsh environments. The usage fiber-optic has flourished many fields over the past 30 years due fiber-optic's inherent advantages: cost-effectivenes...