Placido-disk systems have excellent accuracy and reproducibility in curvature measurement ... topography may improve the accuracy of corneal refractive power estimation for intraocular lens ...

A refractive index of 2.42 indicates that diamond ... at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find the position of the image, its nature and size.

The formulas are covered for topics such as light reflection and refraction, electricity, and magnetism. Lens formulas, mirror formulas, potential differences, magnification, Snell’s law of ...