eye- looking at close and distant objects

to look at near objects ciliary muscles… suspensory..

contract .. relax

this makes the lens

get fatter

this increases

amount of refraction

to look at distant objects suspensory… and ciliary …

tighten relax

this makes the lens

become thinner/less curved

the lens being thinner means amount of refraction

decreases

as you get older you might need reading glasses why?

the lens uses flexibility and can`t easily spring back into a round shape