Blindness - Condition of lacking visual perception

Blindness in humans is defined by the condition in the patient of the condition of blindness looses his or her ability of visual perception because this condition of blindness results in the form of change in the physiological or psychological factors and thus resulting in the condition of blindness.

There are several different kinds of scales and measures that have been developed to describe the overall extent of the loss of vision in the human beings and this is defined by the name of blindness.

When the patient is found to be suffering from total blindness, the patient gets into a scenario of complete lack perception to identify the presence of light and one's reflectivity towards light falling on one's eyes.