How Reading Glasses Were Developed
Eyeglasses where first known as reading stones used for viewing. It was Abbas lbn Firnas who devised a way to produce very clear magnifying glass by shaping and polishing them into round rocks. Emerald glasses and China’s smokey quartz have been used as the early corrective lens and glare protection in the past.
The first wearable reading glasses were produced around 1284 by Salvino D’almarte . Spectacles use different kind of lenses depending on the condition of the person’s eye. Convex lenses were used to correct both hyperopia(farsightedness) and presbyopia(symptom of aging) while concave lenses treats myopia(nearsightedness). However there are people who have both defects such as the famous American scientist, Benjamin Franklin who was using bifocals invented in 1784 to treat both myopia and presbyopia.
Eyeglasses evolved from reading stones to the hystorical types of spectacles; pince-nez, monocle and lorgnette. Over time it became more lighter and durable as they found a way to make plastic reading glasses as clear as glass that would provide better vision correction to modify the focal length of the eye and alleviate the effect of nearsightedness, farsightedness or astigmatism without the risk of breaking.
Sometimes glasses are just for building up identity or personal expression. Like Elton John and Dame Edna Everage, to Groucho Marx and Buddy Holly they were known for their unique eyewear. Without it they become unknown to the public like used by our favorite superheroes Wonderwoman and Superman hiding in their alter ego as Clark Kent or Diana Prince respectively. An example of a halo effect is seen on the stereotypes where those who wear eyeglasses are intelligent to the point where a few of them wears it without lenses just to have that smart and mature look. But most of the time they find people wearing glasses to be nerdy and geeky which turns them into wearing contact lenses due to peer pressure.
Contact lenses have been very popular because it makes people look fabulous and most people like wearing them than the modern eyeglasses. contact lenses may cost more than the eyeglasses but they cost less than the surgery without the inconvenienceof wearing an eyeglasses.Proper cleaning and disinfection should be done before wearing this type of lenses to avoid infection because they are in direct contact with our cornea It requires careful maintenance
Just like medicines buying or wearing prescription lenses is recommended. Opthalmologist or optometrist uses professional lensmeter to correctly verify the prescribed lens to be used measured in diopters rated at +1.00 to +4.00 diopters. For myopia negative diopter strengths are used.
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