Light is a key environmental factor that influences the growth, culture and survival of aquatic organisms. In the present study, the eye tissues of Ino were observed under the light microscope, scanning electron microscope and transmission electron microscope to provide an enhanced histological and cytological basis for analysis of the physiological response mechanism of abalone to light from the perspective of molecular biology. Findings show that the eye tissues, from the outside to the inside, are:retinal pigment epithelium, outer nuclear layer, inner segment, inner nuclear layer, melanin granules sediment and optical fiber layer. Connective tissue mainly exists between the epithelium and the outer nuclear layer, and a portion of the connective tissue nucleus is a darker color. The optical fiber layer mainly comprises the light red reticular nerve fibers which gradually become dense from the outside to the inside. The front ends of eye tissues are cylinder-shaped with an obvious circular depression, in which the reticular nerve fibers are mostly found. The surface of the eyestalk comprises a large number of reticular fibers where the cavities of various sizes are densely distributed. The surfaces of eye tissues are covered with papillae and the top of every papilla has one or two clusters of ciliary rings. The existence of desmosomes between adjacent cells can be clearly seen, and these can limit the expansion of cells and closely link them. Nucleiare found in various shapes and the double-layer nucleus is tightly enveloped by the cell membrane, which contains euchromatin and a few heterochromatin. Myofibrils are widely distributed and are composed of a large number of myofilaments closely arranged along the myofibrils; however, no obvious connection is formed between them. Loose connective tissue, smooth muscle fiber and others are main components in the tissues. Collagenous and other types of fibers distributed between the connective tissues play a key role in maintaining the flexibility and toughness of cells. Mitochondria, Golgi apparatus and lysosomes are also widely distributed in supporting cells. Amoebocytes are uniquely shaped and distributed between the loose connective tissues with pseudopodia and a large number of high electron density particles. Many melanin granules are densely distributed in the cytoplasm; these can prevent strong light from damaging the optical cells, and they also stabilize the internal environment of the retina. Findings demonstrate the significant role played by the optical tissues of the abalone in sensing and identifying external light environmental factors. They also provide a morphological basis for the optimization and regulation of light environmental factors in aquaculture production, as well as an in-depth discussion of the abalone's physiological response mechanism to light.