It should be the instantaneous membrane. It is said that cats can see when they are sick. It could also be trauma or keratitis. It is recommended to go to the hospital for examination and treatment. It is not enough to take medicine and apply medicine at home. Go early, treat early and treat early!

Cats have special pupils. The pupil size of many animals will change. It gets smaller when the light is strong. When it is the smallest, it can be turned into a crack, which reduces the entry of light and protects the eyes. When the light is weak at night, the pupil can be enlarged to absorb more light. In order to see objects more clearly, this is also the reason why cats have much better eyesight at night than people.

Cat's eye, also known as opal and oriental cat's eye, is a rare and precious variety in jewelry. It belongs to orthorhombic system. Crystal morphology is often short columnar or plate-shaped. Opal has many colors, such as honey yellow, brownish yellow, wine yellow, brownish yellow, yellowish green, yellowish brown, grayish green and so on, among which honey yellow is the most precious.

Cat's eye, also known as door mirror, is a small optical instrument installed on the door of a house to facilitate residents to observe outdoor conditions. Cat's eye is also the name of movie software.

Cat's eye refers to the emerald with cat's eye effect. Among all gems, there are many kinds of gems with cat's eye effect. However, in the national standard, only the emerald with cat's eye effect can really be called cat's eye, and other gems with cat's eye effect can't be directly called cat's eye. Gemmology calls chrysoberyl with cat's eye effect cat's eye stone. Generally speaking, opal refers to the gold-green cat-eye gem, while other gems with cat-eye effect must be named as gems, such as aquamarine cat's eye and tourmaline cat's eye.