I buy readers by the 5-pack

I use +3.0 to read books, phone, and kindle, and +0.5 when using my computer. My readers of choice are these cheap horn-rim spex. A five-pack costs [amazon_link asins='B00LJR7N26' template='PriceLink' store='boingboing' marketplace='US' link_id='288370fb-4c30-44ad-a6f6-051a0ef97aff']. I keep a pair in my travel bag and the others are scattered around the house. They tend to gather and disperse like a swarm of semi-intelligent robots.