user14468: According to Abhidhamma, following four conditions must be satisfied for the arising of eye-consciousness.

Eye-door should be good
Visible object must be present
Light must be present
Attention must be present

So my question is, how do we perceive pitch-dark? Do we perceive pitch-dark with mind-consciousness?

user-1: Visible light is the visible spectrum of electromagnetic radiation which upon contact with the sensitive medium can be cognized by the nervous system.
When there is no color vision, that doesn't mean that the eye has no object, there is still vision but it is without color.
When you decide to look and see 'darkness', that experience depends on the nervous system interpreting, conceiving & perceiving the conditions that can be known with the eye element.
If you had no eye then looking wouldn't occur and no information would come into being based on the eye-instrument.
The absense of color vision is seen as a darkness with the eye element, that which sees is the eye, the uncolored spectrum visible is the seen and consciousness cognizes it as 'dark', perception perceives it as 'darkness', can be felt as pleasant or otherwise depending on the circumstance.
This directing of attention to seeing gives you knowledge you wouldn't have otherwise.
A person with no eye can't see darkness in a dark room, can't perceive shades or even direct attention to that knowledge & vision of darkness.
It is kind of evident in that you can see dark spaces in an otherwise illuminated room and there darkness is something you see & know with the eye due to seeing.
You can also think about it as seeing shades of black color as more or less uniform in terms of a distinguishable shape.

user17652: In my understanding, light refers to form only with regards to eye consciousness. When there is pitch dark, there are no visible forms. But the other senses still remain in play perceiving the other aspects of form, for instance: the body feels the tactile sensations of form - a small breeze or the pressure of the body pushing against the ground. Likewise for the remaining sense organs and their respective sense objects. Therefore, this perpetuates the intellect-consciousness and with the absence of light but with the presence of the other sense organs and their sense objects, mind reconciles with itself by creating the perception of pitch dark.

14468: <p>According to Abhidhamma, following four conditions must be satisfied for the arising of eye-consciousness.</p>
<ol>
<li>Eye-door should be good</li>
<li>Visible object must be present</li>
<li>Light must be present</li>
<li>Attention must be present</li>
</ol>
<p>So my question is, how do we perceive pitch-dark? Do we perceive pitch-dark with mind-consciousness?</p>
 -1: <p>Visible light is the visible spectrum of electromagnetic radiation which upon contact with the sensitive medium can be cognized by the nervous system.</p>
<p>When there is no color vision, that doesn't mean that the eye has no object, there is still vision but it is without color.</p>
<p>When you decide to look and see 'darkness', that experience depends on the nervous system interpreting, conceiving &amp; perceiving the conditions that can be known with the eye element.</p>
<p>If you had no eye then looking wouldn't occur and no information would come into being based on the eye-instrument.</p>
<p>The absense of color vision is seen as a darkness with the eye element, that which sees is the eye, the uncolored spectrum visible is the seen and consciousness cognizes it as 'dark', perception perceives it as 'darkness', can be felt as pleasant or otherwise depending on the circumstance.</p>
<p>This directing of attention to seeing gives you knowledge you wouldn't have otherwise.</p>
<p>A person with no eye can't see darkness in a dark room, can't perceive shades or even direct attention to that knowledge &amp; vision of darkness.</p>
<p>It is kind of evident in that you can see dark spaces in an otherwise illuminated room and there darkness is something you see &amp; know with the eye due to seeing.</p>
<p>You can also think about it as seeing shades of black color as more or less uniform in terms of a distinguishable shape.</p>
 17652: <p>In my understanding, light refers to form only with regards to eye consciousness. When there is pitch dark, there are no visible forms. But the other senses still remain in play perceiving the other aspects of form, for instance: the body feels the tactile sensations of form - a small breeze or the pressure of the body pushing against the ground. Likewise for the remaining sense organs and their respective sense objects. Therefore, this perpetuates the intellect-consciousness and with the absence of light but with the presence of the other sense organs and their sense objects, mind reconciles with itself by creating the perception of pitch dark.</p>
