Provided is an excellent optical sheet wherein moiré is eliminated and optical defects are not generated.

The candidate pixels may comprise the optical defect.

Provided is a process for preparing a molded optical article that is essentially free of optical defects.

Optical distortion means an optical defect in a windscreen that changes the appearance of an object viewed through the windscreen.

Thus, the optical film can prevent, when assembled in various optical panels, a poor adhesion or an optical trouble.

Male Edge can also improve this optical shortcoming.

In opposition to emmetropia, which defines an eye with no optical defect, ametropia means that the eye shows some optical error.

Astigmatism is an optical aberration that can be effectively corrected with aspherical lenses.

Techniques and retinoscopic apparatus for measuring or determining a patient's optical error are disclosed.

The invention relates to an essential tool for a process in which an optically flawless window is produced from a semi-finished PMMA product.

Can be worn even with astigmatism: Astigmatism is an optical defect in which vision is blurred.

The optical defect of the eye is corrected with glasses with cylindrical glasses or contact lenses.

On the other hand, there is a slight loss of quality on the edges of the image, a sign of a slight optical defect.

This is a defect of vision which can be corrected by glasses or contact lenses.

A multi-stripe lateral waveguide comprises preferably a lateral photonic band crystal with a lateral optical defect created by selected pumping of multistripes.