3 results about "Narrow angle" patented technology

This utility model discloses an ultra-wide-angle symmetrical projection device, comprising a light source and a reflector with a "U"-shaped structure. The light source is installed in the center of the inner side of the reflector, and the light is guided by multiple sets of reflective surfaces to form four independent illumination areas. This device can simultaneously produce ultra-wide-angle illumination on both sides and long-distance light distribution effect in a narrow angle in front, achieving symmetrical lighting characteristics of ultra-wide-angle on the long side and focused light on the short side. It is suitable for applications requiring large-area and high-precision guided lighting.

The subject invention pertains to a novel angle-closure detection method for risk assessment of primary angle closure (PAC) or primary angle closure glaucoma (PACG) to inform treatment decisions. According to certain embodiments, a plurality of cross-sectional images of the anterior segment of an eye centered at the pupil with preferably even radial separations are obtained from optical coherence tomography imaging. After identifying the position of scleral spur from the cross-sectional image captured at each angle-location, the anterior chamber angles are analyzed. Each angle-location of the eye is classified as (i) closed angle, (ii) narrow angle, or (iii) open angle. The extents of narrow angles and closed angles among all angle-locations across the 360° radial space are computed. Based on the extents of narrow angles and closed angles, a regression model is applied to compute the risk of PAC / PACG development.

Provided is a film-attached translucent substrate exhibiting the properties of translucency, light diffusivity, and opacity. The film-attached translucent substrate comprises a translucent substrate and a film on the translucent substrate. The surface of the film has a surface roughness represented by an RSm of 12 μm or greater and an Rk of 1.2 μm or greater, the total light transmittance Tt is 70% or greater, and the clarity C is 40% or less. The clarity C is a percentage calculated by using the equation [(Tp - Tn) / (Tp + Tn) × 100%] in which narrow angle diffuse light transmittance measured within a range of emission angles of ±2.5° is defined as Tn, and parallel light transmittance is defined as Tp.