Physics: Thick or Thin Lens?

Question

Which lens would have a greater focal length and why? A thick lens or thin lens?

i meant to say, which converged lens will have a greater focal length? Thick or thin?

Answer 1

For a convex lens, a thinner lens will have a greater focal length because the length is mostly determined by the curvature of the lens. Greater curvature gives shorter focal length. A thin lens is almost flat, therefore doesn't have as much curvature. Light striking the lens at a greater angle(more curvature) will refract more.

Answer 2

IT DEPENDS ON WHAT YOUR EYE NEED AND ALSO WHAT IT THE DIFFERENCE AMOUND THAT THEY COST AND WHAT KIND CAN YOU AFFORD AND IF YOU ALSO HAVE INSURANCE WHAT THAT THE INSURANCE PAY AND HOW MUCH IS THE DIFFERENCE