Dictionary » B » Blind spot

Blind spot

Definition

noun

(1) Anatomically, the region in the retina that is not sensitive to light and where the optic nerve and blood vessels pass through

(2) The obscuration in the visual field as caused by the lack of photoreceptors on the optic disc


Supplement

Most vertebrates, including humans, have a blind spot in their vision field. Cephalopods, in contrast, are the animals that do not have a blind spot.

A blind spot is a normal phenomenon first to be documented by Edme Mariotte in 1660s. A blind spot in the vision though does not create a "hole" in the vision field but a continuous background filled in by the brain. Thus, there could be some details or information that may go unnoticed due to blind spot.


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What are some reasons that prove adaptations are not designe

... the eye via the optic nerve, which passes through the retina, leaving a blind spot in each eye. The tissue from which cephalopod eyes is derived is the skin. So, the light ...

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by thoffnagle
Thu Jan 31, 2013 1:04 am
 
Forum: Evolution
Topic: What are some reasons that prove adaptations are not designe
Replies: 12
Views: 4711

Re:

... requires reconstructing the complete image on the retina. Just do a blind-spot test and you'll see that it reconstructs - and constructs. Wouldn't this be evidence AGAINST ...

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by TheSunshineEmperor
Thu May 24, 2012 6:46 pm
 
Forum: Evolution
Topic: Evolutionary advantage of seeing 'upright'
Replies: 17
Views: 6964

Evolutionary advantage of seeing 'upright'

... does in the optic area is process the almost-raw images. Just do a blind-spot test and you'll see that it reconstructs - and constructs.

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by Darby
Thu May 24, 2012 3:03 am
 
Forum: Evolution
Topic: Evolutionary advantage of seeing 'upright'
Replies: 17
Views: 6964

Re: Big bang and Evoluion

... such a so-called “natural” mechanism must come from “birth”. A common blind spot (or imagination) is that there must be a designer to start all these (natural mechanism). ...

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by kk23wong
Thu Dec 17, 2009 10:07 am
 
Forum: Evolution
Topic: Big bang and Evoluion
Replies: 75
Views: 60642

Re: Big bang and Evoluion

... You think we MIRGRANT from other planet, biologists? It's a blind spot to look upon ourself a seperate thing from the Earth. "B-I-O-S-P-H-E-R-E" A ...

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by kk23wong
Tue Oct 06, 2009 5:28 pm
 
Forum: Evolution
Topic: Big bang and Evoluion
Replies: 75
Views: 60642
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