Jackson’s Cross Cylinder
The Jackson's cross cylinder is a lens of fundamental importance in optometry with a key role in the refraction routine. It is used to verify the strength and axis of…
The Jackson's cross cylinder is a lens of fundamental importance in optometry with a key role in the refraction routine. It is used to verify the strength and axis of…
The human eye sight is a highly specialized method to navigate the surroundings. The visual pathway refers to the anatomical structures responsible for the transformation of light energy into electrical…
KNAPP’S LAW : When a correcting lens is so placed before the eye that its second principle point coincides with the anterior focal point of an axially ametropic eye ,the…
What is nystagmus?Nystagmus is a condition that causes involuntary, rapid movement of one or both eyes. It often occurs with vision problems, including blurriness. This condition is sometimes called “dancing…
What is Heterophoria?Heterophoria is the latent muscular deviation of the eyes, which is held in position by the faculty of fusion (The 2nd grade of binocular single vision). It cannot…
WHAT IS SQUINT? = A misalignment of the visual axes of the two eyes is called squint or strabismus . Classification of strabismus : 1)Latent squint:-it is a condition in…
Introduction - Binocular single vision is the condition in which two eyes act together. so that the two dissimilar objects came in each eye and the presence of fusion is the blending of…
Latent squint is also known as heterophoria. The word 'latent' means hidden. It can be described as a condition in which an eye is maintained at the point of fixation…
Diplopia refers to the simultaneous perception of two images of a single object that may be displaced horizontally or vertically in relation to each other. It is also called double…
The eyes are the visual organ and eyeball moves includes voluntary or involuntary movements to increase the field of vision, to reduce blurring. This movements are controlled by a…