The sentences given below, when properly sequenced, form a coherent paragraph. Each sentence is labelled with a number. Decide on the most logical order and enter the sequence of numbers in the space provided. Only numbers are to be entered in the space provided for the answer, and no other letters or characters should be entered. For example, a response such as 3412 or 25143 is valid, and a response such as 3412. or 25143. is invalid.

1. This means the brain receives less input over the course of a day.
2. Youthful eyes jiggle regularly to take in new or unfamiliar stimuli.
3. As the person attached to those eyes ages, the eye muscles grow slower and the pathways between the eye and the brain grow longer, more complex, or, in some cases, get damaged.
4. Our eyes quickly scan the surroundings and then send the data to the brain.
5. Human eyes perform jiggles, more formally called saccades, in response to a change in the field of vision.