September 26, 2008 I will not use the body’s eyes today.

Acuity

Visual acuity is often measured in cycles per degree (CPD), which measures an angular resolution, or how much an eye can differentiate one object from another in terms of visual angles. Resolution in CPD can be measured by bar charts of different numbers of white – black stripe cycles. For example, if each pattern is 1.75 cm wide and is placed at 1 m distance from the eye, it will subtend an angle of 1 degree, so the number of white – black bar pairs on the pattern will be a measure of the cycles per degree of that pattern. The highest such number that the eye can resolve as stripes, or distinguish from a gray block, is then the measurement of visual acuity of the eye.

For a human eye with excellent acuity, the maximum theoretical resolution would be 50 CPD^[12] (1.2 arcminute per line pair, or a 0.35 mm line pair, at 1 m). A rat can resolve only about 1 to 2 CPD. A horse has higher acuity through most of the visual field of its eyes than a human has, but does not match the high acuity of the human eye’s central fovea region.

Spherical aberration limits the resolution of a 7 mm pupil to about 3 arcminutes per line pair. At a pupil diameter of 3 mm, the spherical aberration is greatly reduced, resulting in an improved resolution of approximately 1.7 arcminutes per line pair.^[14] A resolution of 2 arcminutes per line pair, equivalent to a 1 arcminute gap in an optotype, corresponds to 20/20 (normal vision) in humans.

Have you ever wondered why the world appears so messed up? There you go!

If we can’t name it, measure it, categorize it and intellectualize it then it doesn’t exist. Right? The more significance we can place on anything the better we can hold onto it as a thing or concept. We call that significance love. (notice the small L)

T-1.I.22.                Miracles are associated with fear only because of the belief that darkness can hide. 2 You believe that what your physical eyes cannot see does not exist. 3 This leads to a denial of spiritual sight.

T-20.II.1. Look upon all the trinkets made to hang upon the body, or to cover it or for its use. 2 See all the useless things made for its eyes to see. 3 Think on the many offerings made for its pleasure, and remember all these were made to make seem lovely what you hate. 4 Would you employ this hated thing to draw your brother to you, and to attract his body’s eyes? 5 Learn you but offer him a crown of thorns, not recognizing it for what it is, and trying to justify your own interpretation of its value by his acceptance. 6 Yet still the gift proclaims his worthlessness to you, as his acceptance and delight acknowledges the lack of value he places on himself.

T-22.I.2 Yet we have heard a very similar description earlier, but it was not of you. 2 But still this strange idea which it does accurately describe, you [think] is you. 3 Reason would tell you that the world you see through eyes that are not yours must make no sense to you. 4 To whom would seeing such as this send back its messages? 5 Surely not you, whose sight is wholly independent of the eyes that look upon the world. 6 If this is not your vision, what can it show to you? 7 The brain cannot interpret what your vision sees. 8 This [you] would understand. 9 The brain interprets to the body, of which it is a part. 10 But what it says you cannot understand. 11 Yet you have listened to it. 12 And long and hard you tried to understand its messages.

T-22.I.3.                You have not realized it is impossible to understand what fails entirely to reach you. 2 You have received no messages at all you understand. 3 For you have listened to what can never communicate at all. 4 Think, then, what happens. 5 Denying what you are, and firm in faith that you are something else, this “something else” that you have made to be yourself becomes your sight. 6 Yet it must be the “something else” that sees, and as [not] you, explains its sight [to] you. p468 7 Your vision would, of course, render this quite unnecessary. 8 Yet if your eyes are closed and you have called upon this thing to lead you, asking it to explain to you the world it sees, you have no reason not to listen, nor to suspect that what it tells you is not true. 9 Reason would tell you it cannot be true [because] you do not understand it. 10 God has no secrets. 11 He does not lead you through a world of misery, waiting to tell you, at the journey’s end, why He did this to you.