A severely myopic patient has a far point of 5.00 cm. By how many diopters should the power of his eye be reduced in laser vision correction to obtain normal distant vision for him? Assume the image at the back of the eye is formed 0.2 m from the eye's lens.
To find the power of the eye that needs to be reduced in laser vision correction, we need to calculate the refractive error of the patient's eye.
The refractive error can be determined using the formula:
Refractive Error (in diopters) = 1 / Far Point (in meters)
First, let's convert the far point from centimeters to meters:
Far Point (in meters) = 5.00 cm / 100 = 0.05 meters
Now we can calculate the refractive error:
Refractive Error = 1 / 0.05 = 20 diopters
Therefore, the power of the patient's eye needs to be reduced by 20 diopters in the laser vision correction to obtain normal distant vision.