fresnel prism meaning in Hindi

Examples

1. This is most commonly achieved through the use of fresnel prisms.
2. Also, plastic prisms ( Fresnel prisms ) can be attached to eyeglasses of a diplopic patient, allowing for alignment of vision from both eyes in the affected direction, but are often problematic if the degree of muscle weakness, and therefore ocular misalignment, fluctuates frequently.
3. At both public appearances, as well as at the second inauguration of Barack Obama, Clinton wore glasses ( instead of her usual contact lens ), which upon closer examination were seen to have Fresnel prisms attached to them, likely to counteract lingering blurred or double vision from her concussion.