Posted in:
General , Glasses
True or False: A Different Light
By Peter - 23 June 2011
- In the sixteenth century, people who needed glasses chose their eyewear depending on their wealth. Buyers would select thick lenses for their spectacles as thick lenses were seen as an attribute of power, wealth and respect.
- There has been plenty of research and development to suggest 3D prescription glasses will be released in the future.
- Around 15-20% of the eye is visible.
- You can sneeze with your eyes open.
- Glasses can focus the sun’s rays and start a fire in the same way magnifying glasses can.
1. False
People chose glasses by randomly trying on specs until they found a pair they could see from or see better with. If people were buying glasses as a sign of their wealth and status, they would never be able to see through them unless their eyesight was terrible.
(sources: spectaclefacts.blogspot.com)
2. True
The success of 3D films on cinema led to 3D TV sets being released. This created an eye opener for many glasses manufacturers and is certainly an area that hasn’t been touched yet. A possible market can be established here and Italian giants Luxottica (who own Ray-Ban and Oakley) have already made their move. 3D prescription glasses may or may not have been released already.
(sources: news.com.au)
3. True
15-20% of the eye is visible with the average human. Under certain circumstances, this can be increased to 40-45% but these are rare cases.
(sources: wiki.answers.com)
4. True
When we sneeze, a body reflex kicks in which shuts the eye lids. However not everyone has that reflex and some people have learnt to control certain muscles and can sneeze with their eyes open. Eyes popping out from a sneeze if you don’t close them is a myth.
(sources: library.thinkquest.org)
5. True
Glasses can start a fire in the same way as magnifying glasses but only when two circumstances are met. The first being the irradiance at the spot is a minimum of at least 43.6 kW/m2. The second is that the glasses lenses must be convex in order to focus light on a point. For more information about irradiance, you can find it more from the source.
(sources: laser.physics.sunysb.edu)
Tagged with: 3d prescription glasses, eyes, glasses, History, magnifying glass, prescription glasses, Sneeze, Sun, true or false
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Posted in:
Fashion , Sunglasses
Maui Jim sunglasses
By Peter - 7 June 2011
Tagged with: Designer sunglasses, Forbes, Maui Jim, polarised lens, Sunglasses, word of mouth
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Posted in:
General , Humour
Optician's Restaurant
By Peter - 1 June 2011
Tagged with: Comedy, Glasses, Humour, Optician, Restaurant, Ronnie