Canine visitors and cataracts

We have had a couple of special guests coming into the practice this week. A lovely bear of a New Foundland dog - we have photos of 60kg of calm sitting in reception - and Oliver, my parents' Shih Tzu, who is more enthusiastic to see us (he's also younger).

Speaking of dogs, it can be obvious when your elderly dog has cataracts. Because they use smell rather than sight (in general) their behaviour doesn't change much until their vision is really poor. My in-laws' dog would only bump into furniture when she was really concentrating on a scent and her vision was poor, to be kind. But you can see a thick greyish sheen inside the eye - the pupil looks light not black - all the time, not just in certain lights.

This is very rare in humans, except in very poor parts of the third world. Most people are very disadvantaged visually with a cataract that is not apparent to the outside observer.

So if someone tells you that they could see a cataract in someone else's eye, it much more likely to be a problem of the cornea or even the conjunctiva, all anterior (front) of the eye rather than the lens (inside the eye).