Overview. Complex carbohydrates are made up of sugar molecules that are strung together in long, complex chains. Complex carbohydrates are found in foods such as peas, beans, whole grains, and vegetables.
Confidence votes 11.2K. Taught College level A&P for 27 years. The lens in the human eye is a convex lens, but it is flexible and when it is acted on by the ciliary muscle around it, the lens can be flattened to change the focus, or, when the muscle is relaxed, the lens can assume a more spherical shape.
â¢ The conjunctiva (a thin layer of tissue covering the front of the eye, except the cornea). Just behind the iris and pupil lies the lens, which helps to focus light on the back of the eye. Most of the eye is filled with a clear gel called the vitreous.