Employment of clinical, counseling, and school psychologists is projected to grow 20 percent from 2014 to 2024, much faster than the average for all occupations. Greater demand for psychological services in schools, hospitals, mental health centers, and social services agencies should drive employment growth.
Computer glasses are for intermediate viewing distance (distance from your seated position at your desk to your computer (usually about 50cm to a meter) Driving lenses usually do not have any reading power and are referred to as single vision lenses.
The distance between the eye-lens and the retina is about 20 mm. When an object is very far away from the eye, the image is located essentially at the focal point. Therefore the focal length of the cornea and the eye-lens should be about 20 mm when the muscles of the eye are relaxed.Since the strength of a lens is the reciprocal of its focal length in meters, the strength of the cornea and the eye-lens in this situation is about 1/0.020 = 50 diopters.he distance between the eye-lens and the retina is about 20 mm. When an object is very far away from the eye, the image is located essentially at the focal point. Therefore the focal length of the cornea and the eye-lens should be about 20 mm when the muscles of the eye are relaxed.