Late at night, when I should be tucked up in bed, I’d read stories on-line about the potential for harm to the retina from the blue light thrown by computer screens – particularly the way it suppresses melatonin and makes it harder to sleep. Snapping my computer shut and going guiltily to bed, I’d forget all about the blue light thrown by screens the next day. Until, two months ago, I read a fellow blogger’s post about her improved eyesight – she’s a journalist – after installing a blue-light cancelling filter on her laptop.
Around the age I am now my father asked me to read to him the daily share index from the newspaper, as I sat by his hospital bed after a cataract operation – months later repeated on his other eye. Cocooned by youth, never for a moment did I link my father’s eye problems with my own future eyesight. Till one day, earlier this year, I sat with my chin on a plastic shelf, looking into a new diagnostic retina camera, during a routine eye check-up, and heard an opthamology student mumble something about early signs of glaucoma to the assistant by his side. After a worried return visit, a more senior optician, who I usually see, set my mind at rest about early signs of cataracts or, worse, glaucoma – which my mother and aunt both suffered. The early signs of eye disease, picked up by the opthamology student, were shared by most people over a certain age; and, he reassured, weren’t a predictor of disease.
Nevertheless it was these memories that drew me to the journalist’s post about the benefits of blue-light cancelling software, and that led me to respond to the blogger’s urging to download free software. Looking at my laptop screen, after first installing this software – though I should admit that I asked my daughter to download it – made me feel as if I was wearing sunglasses inside the house. The screen had a yellowy hue. However I instantly forgave it because having it installed on my computer (and phone) lifted from my mind a weight I hadn’t known I’d been carrying. Installing blue-light cancelling software – which I adjusted to come on whenever my computer and phone is on, rather than as the sun goes down – had the immediate effect of stopping me worrying about eye disease in old age. I’m not so dim as to think a screen filter will shield me from eye problems, but I did feel that installing it was a form of insurance for my eye health into the future.
Three days later something unexpected, a bonus, happened. My eyes, which often felt irritated after working long hours on the screen, stopped feeling red and irritated, even after hours on the screen. Next I started leaving my glasses at home when I went out and worked on my computer. Having worn glasses on and off for years, I never imagined that I might come to need them less. Of course this software isn’t miraculous. I still read small print better with my glasses on. But I don’t need glasses the way I used to; mostly I can take them or leave them.
This leads me to wonder why opticians, and the media, aren’t more open about the potential benefits of blue-light cancelling software. Do we really want to raise a generation of squinty-eyed kids in need of eye surgery? Are we waiting for twenty-year controlled experiments to confirm word-of-mouth findings?
So here is my Christmas wish to you, dear reader. Install some free blue-light cancelling software, wait a few weeks, and see the difference!