Tag Archives: Puplight

Eyesight in the older dog

The eyesight in our dogs changes with age.

English Pointer with Puplight

Researchers based at the Nestlé Purina Research Center in Missouri have discovered that our dogs become more near-sighted as they age.  Their results were published in the journal PLoS One.

This investigation used an instrument called an autorefractor to measure the dogs’ eyesight in indirect and direct lighting conditions. The study involved nine Beagles ranging in age from 1 to 14 years.   Before entering the study, the dogs were examined to confirm that none of them had cataracts.

Measurements were taken on three different days of the week for a period of six weeks.

The researchers found a remarkable difference between the younger and older dogs.  The older dogs had a much-reduced ability to see at longer distances (far-sightedness) compared to the younger dogs.  Younger dogs were also able to make larger accommodation changes from indirect light to direct light conditions, indicating a more flexible lens.

Humans are the opposite in terms of length of sight.  As we age it can become more difficult to read and see things at shorter distances whereas our ability to see at distances is often not affected (although some older people do have difficulties adjusting to night and low-light conditions, just as the dogs in this study did).

So if your dog is getting older and you notice that they can’t pick up on your body language and signals, there’s a physical reason for it.

Through my own experience working with older dogs, I recommend using a light that helps your senior dog adjust to low-lighting conditions.  See my post on the PupLight, for example.

Kathleen Crisley, specialist in dog massage, rehabilitation and nutrition/food therapy, The Balanced Dog, Christchurch, New Zealand

 

The PupLight – helping an older dog see at night

As a dog gets older, it is common that they will experience a loss of eyesight or visual acuity.  I have found that many owners assume that their dog has cataracts but a more common problem is nuclear sclerosis.

Nuclear sclerosis, which is also called lenticular sclerosis, is a condition that causes the pupils of the eyes to look cloudy and often blue-gray in colour.  Nuclear sclerosis isn’t painful and it comes upon the dog gradually.  At some point you will notice that your dog isn’t seeing well at night and their peripheral vision may also be limited.

Such is the case with my Daisy.  We have stairs that go from our house to the outside garden and I noticed that she would stop dead at the top of the stairs because she couldn’t see the steps in the dark. It made sense that, although I could turn a light on in the house, the lighting in the garden wasn’t as easy.

Then I found the PupLight, the lighted dog collar.  Although marketed most strongly for people who walk their dogs at night and need to be visible to traffic, I decided to give it a try…

The PupLight

The PupLight

It’s been great!  Just what we needed.  I can clip the collar on before letting Daisy out at night and she can see the steps, and all the irregularities in the garden.  And she adjusted to its use very well.

Daisy shows off her PupLight dog collar

Daisy shows off her PupLight dog collar

The PupLight's bright light makes it much easier for Daisy to see at night

The PupLight’s bright light makes it much easier for Daisy to see at night

Bottom line:  Highly recommended product, particularly for senior dogs

Note:  This product endorsement is entirely my own and was not paid for by the PupLight company or its retailers.