Question

sita goes to an eye hospital and gets tested for vision defects the doctor prescribes her the use of -3D lens what type of defect in vision sita is suffering from mention the type of lens and find the focal length of the lens prescribed by the doctor​

Answer 1

Answer:

• its ..Presbyopia.... bifocal length & if it will be nearsightedness than it will be concave lens . if it is farsightedness than it will be convex lens .