What is the other name of old age hypermetropia?

Name the defect of vision in which the eye-lens loses its power of accommodation due to old age.

Name the defect of vision which makes the eye-lens cloudy resulting in blurred vision.

Name any two defects of vision which can be corrected by using spectacles.

Name one defect of vision (or eye) which cannot be corrected by any type of spectacle lenses.