Vision, Glasses & Contacts
How to measure your pupillary distance (PD) at home
What pupillary distance means, how to measure it at home with a ruler and a mirror or a friend, single, dual and near PD, and when to let an optician measure it.
eye health through the seasons
Welcome
to a notebook on eyes and everyday life

For the days you want to understand your eyes a little better.
From how eye conditions work to everyday care,
explained in plain words, season by season.
Vision, Glasses & Contacts
What pupillary distance means, how to measure it at home with a ruler and a mirror or a friend, single, dual and near PD, and when to let an optician measure it.
Vision, Glasses & Contacts
Rinse first, a drop of plain dish soap, a clean microfiber cloth: a former optical shop worker on cleaning glasses safely and what never to use on coated lenses.
Everyday Eye Care
Tired eyes after an evening with a book usually come from the light, the distance and the print, not the story. Simple fixes, early presbyopia, and when to get checked.
Eye Conditions
Most eyelid twitches are harmless and fade within days or weeks. The usual causes, simple habits that help, and the signs that mean a doctor should take a look.
Eyes in Later Life
A lighted magnifier can bring small print back within reach, but it works best after an eye exam and with good light and the right readers. How to choose and hold one.
Vision, Glasses & Contacts
Astigmatism means the eye focuses light unevenly, so things blur at every distance. What causes it, how it shows on a prescription, and when to see an eye doctor.
How to find an eye doctor, what happens at a first exam, how to read clinic hours and what to do when trouble starts over a holiday. For symptoms that can't wait, see eye emergencies.