Sensory issues are often the crux of the symptoms of autism spectrum disorders, and because most people spend their waking hours with their eyes open, visual problems are often the most tiresome. Light sources, rather natural or manmade, can be a blessing or curse for those with this sensitivity. 
In the U.S., we’re on the verge of a possible lighting crisis. The turn of the New Year will mark another reduction in light bulb options, closing the choice of yet more incandescent bulbs at stores around the country. Fluorescent lights, whether long strip bulbs or the compact swirly ones (which are terrible for the earth—read the disposal warning on them), are often visual triggers for susceptible people. The flicker, harsh glow, and even the hum of the offending bulbs can cause headache, eye fatigue or emotional meltdowns for those with sensory difficulties.
The same thing happened, not long ago, in the United Kingdom. You can read one account of it here. http://www.autism.org.uk/working-with/leisure-and-environments/architects/light-sensitivity-and-autism.aspx
This an important situation for me, as myself and loved ones suffer from light sensitivity. Ben, one of the main characters in CORRODED (one of my fictional labors of love, yet-to-be-published stories) has to deal with this as well. Here’s a little peek, from Chapter Ten, when Mary and Ben are at his house playing a round of Battleship.
“You never explained to me why you don’t go outside during the day,” I said.
“I go outside. Remember the first day we met? I sat on the porch with you and your mom.”
“Oh… well, then why don’t you go for walks and stuff?” I asked.
“I’m sensitive to sunlight.”
“Like, you burn easily?”
Ben shook his hands like he was air-drying them. “No, it’s my eyes. Bright sunlight causes sensory overload and I can barely function. Fluorescent light does the same thing. It’s common for Aspies.”
I looked up at the soft white glow of the over-head lights. “So, going to schools and office buildings must be difficult.”
“The worst. That’s one of the reasons I homeschool. If I do have to venture out for a medical appointment or something I wear sunglasses inside.”
