Start A Petition

Lazy Eye in Kittens Cured By Total Darkness

Science & Tech  (tags: animals, cats, kittens, treatment, science, investigation, discovery, lazy eye )

- 1915 days ago -
Canadian researchers have found out how to restore normal vision to kittens with a lazy eye without using an eye patch.

Select names from your address book   |   Help

We hate spam. We do not sell or share the email addresses you provide.


Michael O (176)
Friday February 22, 2013, 8:34 pm
The cure was relatively simple putting the kittens in complete darkness for 10 days. Once the kittens were returned to daylight, they regained normal vision in the lazy eye within a week, reported researchers at Dalhousie University in Halifax in the journal Current Biology this month.

Lazy eye is a condition where the brain effectively turns off one eye. It affects about four per cent of the population in humans, and the most common treatment is fix the vision problem (for example, by using glasses) and then patch the good eye, forcing the person to use their bad eye.

Treatment is most effective in younger children.

Kevin Duffy, a neuroscientist who co-authored the new study, told CBC's Quirks & Quarks that the condition is typically the result of a vision problem such as a cataract, a misalignment of the eyes, or poor focus in one eye, which then causes the brain to develop abnormally.

"If the eye is providing abnormal vision, then the circuits that connect to that eye are going to develop abnormally," he said. The brain "becomes effectively disconnected."

While patching is a common treatment, there are two main problems with it, Duffy said. One is that getting the child to wear a patch isn't easy. The other is that the patch prevents both eyes from learning to work together, which is needed for tasks such as judging distances.

In Duffy's study, kittens with normal vision developed lazy eye after wearing a patch for seven days. The patch was removed, and the kittens were allowed to see with both eyes for five weeks.

Tests showed they could see only one-third as well with the lazy eye as they could with their normal eye.

The kittens were then put in a special laboratory facility for 10 days.

"It's a darkroom inside of a darkroom inside of another darkroom," Duffy said. "So the central room is the proper darkroom and it has zero photons of light."

When the kittens were brought back to normal light conditions, the lazy eye regained normal vision within five to seven days.

The researchers think the darkness may put the brain into a state that allows it to change more easily.

"It may be that the pattern of activity produced by the eye in darkness is reminiscent of an earlier time of development," Duffy said, "and it may be that pattern of activity that's instructing the brain to revert back to the earlier stage."

Despite the promising results of the study, Duffy said he wouldn't yet recommend that the treatment be tested on humans.

Currently, he said, the researchers are trying to figure out whether they can get the same positive effect if:

- The period of complete darkness is shorter than 10 days.
- The darkness is not complete.
- The kittens are exposed to light for 30 minutes each day.

"All of these questions, I think, have to be answered," Duffy said, "and perhaps many more, before clinicians would be willing to implement this treatment in humans."


Terry V (30)
Friday February 22, 2013, 9:34 pm

Julie F (68)
Saturday February 23, 2013, 4:57 pm
Very cool!

Iveta cer (41)
Saturday February 23, 2013, 5:09 pm

Vicky P (476)
Saturday February 23, 2013, 7:00 pm
wow, great

Past Member (0)
Saturday February 23, 2013, 8:42 pm
Ooooh, that's interesting I hope it leads to a new treatment for humans, though as it is now I shudder to think of spending 10 consecutive days in a darkroom.

Natalie V (27)
Sunday February 24, 2013, 4:30 pm

Robert O (12)
Monday February 25, 2013, 12:26 am
Thanks Michael.

Helen Porter (39)
Monday February 25, 2013, 6:48 am

Grace P. (0)
Wednesday May 11, 2016, 9:25 am
If not God, i would have be totally blind. Brethren I am Grace by name i want to let all here know how i suffered from glaucoma for a very long time. in my fifteenth year i had eye issues, and i was taking to a doctor by my parents, the doctor diagnosed cataract in my eyes was the cause of my eye problem, so i was treated and i was no longer using glasses. But as i grew older i found out that i was losing the use of my eyes as i was having real shortsightedness so before i got married, it became very bad that i have to see a doctor again, and this time i was diagnosed of glaucoma, and the doctor said there is no cure to it. so i was suffering from glaucoma and i needed the cure desperately i lost Hugh amount of money to doctors in USA who claim they can assist reduce its effect but still nothing was done no improvement rather it was becoming worst. i always go to church and cry to God to please help me out of this situation. After some time i was seeing only the chest of someone standing in front of me i was not seeing the other part of the persons' body. So this prompted me to look for cure with all means. i surf the web and got several ways to cure it but i tried so many ways, and none worked out well. I came across someone who gave a testimony about how his cousin was cured of CJD through the use of herbal medicine administered to him by one Doctor Uwadia Amenifo he also includes the herbalist contact details, so i decided to try to ask him if he can cure me. i contacted him, and he said to me that he have cured so many people of glaucoma and i was very surprised and the question i asked myself was that why have i not come across these already cured people ever since for them to share their experience with me. so the herbalist counseled me and after that we made the arrangement, and he prepared the herbs and send it to me in my country. i followed his prescription on the dosage and how i am to take it, and behold just like a dream to me it was as if i was watching a film, i was cured within a short space of time, and after i was cured i informed the herbalist and thanked him very much so he pleaded that i share this among people who have same problem that feels that all hope is lost. Brethren, today i can see clearly, and very far, my glaucoma is gone and gone for life. For this reason i want to say a big thanks to Doctor Uwadia Amenifo for his wonders work in my life his herbs are very potent. Please if you want your glaucoma and eye problem cured. i advise you contact Doctor Uwadia Amenifo and get his herbs for your cure. His email is and his phone number is +2349052015874.
Or, log in with your
Facebook account:
Please add your comment: (plain text only please. Allowable HTML: <a>)

Track Comments: Notify me with a personal message when other people comment on this story

Loading Noted By...Please Wait


butterfly credits on the news network

  • credits for vetting a newly submitted story
  • credits for vetting any other story
  • credits for leaving a comment
learn more

Most Active Today in Science & Tech

Content and comments expressed here are the opinions of Care2 users and not necessarily that of or its affiliates.

New to Care2? Start Here.