The human eye can be compared to a highly sophisticated, variable focus and auto-focusing, extremely high resolution, organic digital camera which has a front surface anti-reflective coating and is also self healing just in case of accidental damage!
The eye has many specialized components, but a few of the more important structures within the eye include:
A problem with any one or a combination of these structures within the eye can reduce the quality of your vision, and the quality of your life.