You may be referring to floaters. To wit, pieces of cellular matter that have sloughed off the inside of the eyeball and pass between the retina and the optic nerve. I have them; lasers can clear them if you so wish.
why isit difficult to see the details of images that are formed at the edge of the retina
On the retina.
Retina is a part of eye where images of objects are formed.
brain
The retina is where the image is formed.
The inverted image in the eye is formed on the retina. The lens of the eye helps focus light onto the retina, where photoreceptor cells convert the light into electrical signals that are then sent to the brain for processing.
The image should form on the retina. More specifically in the fovea centralis of the macula of the retina.
Green aventurine is formed through the crystallization of quartz with small inclusions of fuchsite or other minerals. These inclusions give green aventurine its distinctive shimmering effect, known as aventurescence. The color can range from light green to a deeper, more vibrant green depending on the concentration of inclusions.
The inverted or upside-down image is formed on the retina.
An image is formed on the retina at the back of our eye. The retina contains special cells that detect light and convert it into electrical signals that are sent to the brain for processing.
It can't. Lololololz.
In the human eye, images are formed on the retina, which is a light-sensitive layer located at the back of the eye. The lens of the eye helps focus light onto the retina, where it is converted into electrical signals that are sent to the brain for processing.