Today there is an entire industry that revolves around eye care, and corrective lenses. Ordering glasses online is almost as easy as ordering a new computer, or paying a bill with online banking. Glasses have had an amazing impact on individuals with visual impairments. However, throughout most of human history, if your vision wasn’t clear, then you would simply have to cope with the visual impairment and hope that your friends and family would inform you about nearby dangers.
The discovery that preceded the creation of spectacles was only as recent as about 1000 ACE. Reading glasses back then were essentially large glass paperweights, called reading stones. People used the principles of magnification to view im Continue reading