It's considered good practice to get regular eye exams for catching problems inside the eye, and the most common way of doing an eye exam is by shining a bright

It's considered good practice to get regular eye exams for catching problems inside the eye, and the most common way of doing an eye exam is by shining a bright light inside the eye and viewing it with a magnifier. The illumination only works if pupils can't accommodate. NB in the USA nobody I know does get regular eye exams but we should especially later in life because some types of macular degeneration can be slowed down somewhat with various therapies