what causes cross eye

Hypermetropia is caused due to the following reasons: Shortening of the eyeball, that is, the eyeball becomes smaller. Increase in focal length of the eye lens. Focussing of light rays in normal eye and long sighted eye Let us now see how this defect is recti..

The Eye - Our eye is the most important natural optical instrument. The eye is nearly spherical in shape with a slight bulge in the front par..

The Eye - Our eye is the most important natural optical instrument. The eye is nearly spherical in shape with a slight bulge in the front par..

Our eye is the most important natural optical instrument. The eye is nearly spherical in shape with a slight bulge in the front par..

Our eye is the most important natural optical instrument. The eye is nearly spherical in shape with a slight bulge in the front par..

In lanthanides, the nuclear charge increases by one unit at each successive element and this new electron enters the 4f-subshell. Due to the peculiar shapes of f-orbitals, there is imperfect shielding of electrons from the nuclear attraction. As a result of this the size of lanthanide atoms decrea..

Crossing Over - Genetic recombination crossing over is the mutual exchange of the corresponding parts of the adjacent paternal and maternal chromatids of the pachytene of meiosisI, producing new combinations of genes. The chromatids resulting from the interchange of segments are..

If an F 1 individual or an individual of F 2 or F 3 generations is crossed with any one of the parents it is called a back cross..

">Refractive Errors or Defects of Vision The abnormalities in the normal vision of the eye due to the change in focal length of the lens or due to the deformation of cornea are known as refractive errors or defects of vision. Myopia Myopia is an eye defect due to which the ..

Along the arched upper ridges of the eye sockets are hairs that form the eye brows. They prevent the dust, rain, sweat, etc from entering the eyes..