d, as accurately and clearly as we can see
any part of the exterior of the body. No discomfort arises to the organ
examined, and all its hidden mysteries can be studied and understood as
clearly as those of any other organ of the body.

This course was taken with John Palmer, and the true secret of his
mysterious power of vision detected in an instant.

On applying the ophthalmoscope, the committee ascertained in a moment
that the boy's eye was abnormally shaped. A natural, perfect eye is
perfectly round. But the eye examined was exceedingly flat, very thin,
with large iris, flat lens, immense petira, and wonderfully dilated
pupil. The effect of the shape was at once apparent. It was utterly
impossible to see any object with distinctness at any distance short of
many thousands of miles. Had the eye been elongated inward, or shaped
like an egg--to as great an extent, the boy would have been effectually
blind, for no combination of lens power could have placed the image of
the object beyond the coat of the retina. In other words, there are two
common imperfections of the human organ of sight; one called _myopia_,
or "near-sightedness;" the _presbyopia_, or "far-sightedness."

"The axis being too long," says the report, "in myopic eyes, parallel
rays, such as proceed from distant objects, are brought to a focus at a
point so far in front of the retina, that only confused images are
formed upon it. Such a malformation, constituting an excess of
refractive power, can only be neutralized by concave glasses, which give
such a direction to rays entering the eye as will allow of their being
brought to a focus at a proper point for distant perception."

"Presbyopia is the reverse of all this. The antero-posterior axis of
such eyes being too short, owing to the flat plate-like shape of the
ball, their refractive power is not sufficient to bring even parallel
rays to a focus upon the retina, but is adapted for convergent rays
only. Convex glasses, in a great measure, compensate for this quality by
rendering parallel rays convergent; and such glasses, in ordinary cases,
bring the rays to a focus at a convenient distance from the glass,
corresponding to its degree of curvature." But in the case under
examination, no glass or combination of glasses could be invented
sufficiently concave to remedy the malformation. By a mathematical
problem of easy solution, it was computed that the nearest distance from
the unaided eye of the patie