In 1988, pigeon fancier Chen Changyuan and I planned a scientific experiment on pigeon eyes to find photoreceptor cells from the iridescence to prove the effect of eye sand on pigeons' homing. He was a doctor, and he hired two famous chief physicians of the pathology department to spend two months doing physiological anatomy on the pigeon's eyes. No less than 10 homing pigeons were used and divided into two experimental groups. The pigeon eyes were frozen and then sliced. After magnifying 500-2000 times, the fine structures of the eye sand, eye signs and character circles were observed, and 36 color films were taken. The conclusion is very disappointing. The eyes are not photoreceptors, but are composed of nutrient blood vessels and pigment cells. The eyes and the character circle are two muscles, which are "incompatible" with the genetic performance of pigeons. Of course, the development of these nutritional blood vessels and muscles has a direct effect on the performance of the pigeon's eye function. This experiment is an important achievement in the scientific research of homing pigeons in our country, but pigeon eye theorists do not give it a second thought, because according to them, "pigeon eye research is not limited by biology" and "Mendel's laws are not suitable for pigeons." Eye Research". In order to provide reference for pigeon fanciers, 8 of the selected photos were published in "Chinese Pigeon", and Chen Yuanchang wrote an article describing the process and conclusion of this experiment.