Don't know what you mean by 'serious.' Do you mean 'serous' as in fluid-filled? The membrane that can cover over a frog/toad's eyes (and other amphibian, reptile, even mammal species) is known as a 'nictating' membrane. It is there to protect against fluid and debris from coming into contact with the corneal surface of those eyes.
It dosent use refraction it allows for it, it shoots down its prey with water droplets from under water so it must cope for refraction and somehow it can, that's why its an amazing fish its because it can calculate the level of refraction and cope with it.
Eyes are typically located on the face, above the nose and below the forehead. They are placed symmetrically in eye sockets to provide binocular vision and depth perception.
You should use eye drops specifically formulated for dogs. Some of the preservatives and other ingredients in human eye drops can be damaging to their eyes. Speak with your veterinarian to find out what brands are safe.
A kestrel's eye is large in proportion to its head, and they have excellent vision for hunting prey. Their eyesight is estimated to be about 8 times better than that of a human, allowing them to spot small rodents from great distances. Kestrels also have a unique ability to see ultraviolet light, which helps them track the urine trails of their prey.
Assuming your talking about the eye...it would be the aqueous humor. The aqueous humor is produced by the ciliary processes in the ciliary body. It flows from the ciliary body into the anterior chamber. It travels out through the trabecular meshwork and into the Canal of Schlemm. It is then delivered to the bloodstream via anterior ciliary veins.
The vitreous humor is a gel-like substance found in the posterior chamber of the eye, while the aqueous humor is a watery fluid found in the anterior chamber of the eye. The vitreous humor helps maintain the shape of the eye and plays a role in supporting the retina, while the aqueous humor helps nourish the cornea and maintain eye pressure.
the aqueous and the vitreous humor
Cornea, aqueous humor, lens, vitreous humor
Eye
The vitreous humor is thicker and more gel-like compared to the aqueous humor. The vitreous humor helps maintain the shape of the eye and provides support to the retina, while the aqueous humor helps nourish the cornea and lens.
It is called Aqueous Humor.
The aqueous humor helps maintain the shape and pressure of the eye and provides nutrients to the cornea and lens. The vitreous humor helps maintain the shape of the eye and supports the retina at the back of the eye.
The fluid in the anterior chamber of the eye is called aqueous humor. It helps maintain the shape of the eye and nourishes the cornea and lens. Any disruption in the production, flow, or drainage of this fluid can lead to conditions such as glaucoma.
cornea, lens, aqueous humor, vitreous humor
The aqueous humor is the colorless transparent fluid portion of the eye.
The clear fluid that helps the cornea keep its rounded shape is called aqueous humor. Aqueous humor is produced by the ciliary body and fills the anterior chamber of the eye, providing nutrients and oxygen to the cornea and other structures in the eye.