For many years I have discussed the eye’s ability to see in darkness with examples from astronomy. “When you go outside at night and look at the stars…”

Mrs Digby shuffled into the room on the arm of the professor. He led her to the chair and after a brief enquiry about her health, asked what she could read on the letter chart.

Her eyes feverishly...

“Do I have 20/20 vision?”

This is one of the most common questions I’ve been asked by patients at the end of an eye examination.

Although being able to read letters on a vision chart is an...

A colleague recounted this story to me last week:

I was onsite talking to a warehouse manager. They had an employee who frequently bumped into objects while driving a forklift.

“We can’t work...