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Spectacles

spectacles

lenses set in a frame that holds them in front of the eyes, used to correct errors of refraction or to protect the eyes. The parts of the spectacles are the lenses; the bridge between the lenses, resting on the nose; the rims or frames, encircling the lenses; the sides or temples that pass on either side of the head to the ears; the bows, the curved extremities of the temples; the shoulders, short bars attached to the rims or the lenses and jointed with the sides.

Synonym: eyeglasses, glasses.

Origin: L. Specto, pp. -atus, to watch, observe


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Re: Where do we go from here?

... load of antibiotic resistance any more. Similarly, albeit not as obviously, humans keep evolving even today. If poor eyesight can be fixed by spectacles, there is maybe no more need for good eyesight genes, and thus, in the current environment, humans could slowly evolve towards poorer sight. ...

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by biohazard
Mon Jul 05, 2010 10:37 am
 
Forum: Evolution
Topic: Where do we go from here?
Replies: 41
Views: 32408

Where do we go from here?

... most people will need some kind of seeing aid, because poor vision is no longer an evolutionarily significant disadvantage due to the invention of spectacles. Human evolution is very likely to hand in hand with all kinds of technical tools we develope, and in the future they will surely be much ...

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by biohazard
Mon Jun 14, 2010 6:54 am
 
Forum: Evolution
Topic: Where do we go from here?
Replies: 41
Views: 32408

CHROMOSOMES

... Myopia is strongly heritable, but only develops when the eyes are used for much close work (e.g., reading) in childhood. The global increase in spectacles-wearing is not a result of eyeglasses frustrating natural selection and so degrading the human gene pool, but of cultural practices activating ...

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by lg1
Wed Jul 04, 2007 2:35 pm
 
Forum: Cell Biology
Topic: CHROMOSOMES
Replies: 15
Views: 8884

spectacles

i meant that i m worry dr says that ur eyes will b turned,sorry to say i dont know the exact term for it in bio

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by hbeing
Tue Aug 01, 2006 1:13 pm
 
Forum: Human Biology
Topic: spectacles
Replies: 10
Views: 3752

spectacles

i got checkup of my eyes.dr wrote down axis of my right eye -o.50 nd left eye -0.75.i aske him if i m affecting frm long or short sightedness.he said both you have to wear glasses permanently otherwise ur eyes will be turned.i m worry y both eyes have different no.

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by hbeing
Tue Aug 01, 2006 7:36 am
 
Forum: Human Biology
Topic: spectacles
Replies: 10
Views: 3752
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