首楞嚴義疏注經 2.455

2.455

非是真月之體，又非水中之影，但是捺目根識參差，故見二相，其實無體，如彼圓影目眚所成，無體可得。

It is neither the substance of the true moon, nor a reflection in the water; it is merely that pressing the eye causes the faculties and consciousness to become skewed, so that two marks are seen, when in reality there is no substance. Just like that circular halo produced by an eye cataract, no substance can be found.