Retinal Tear and Detachment
The retina is present at the back of our eyes and when light rays are focused on it through cornea, it converts it to signals and sends it to the brain through the optic nerve. Vitreous is a clear gel present in the middle of eyes. This gel will cast shadow sometimes on the retina and that is why we see dots or strings moving along the field of vision, known as floaters.
When we grow old, the retina gets pulled by the vitreous and in turn we see light flashes or stars, known as flashes.
Tear and detachment:
The vitreous pulls the retina without causing any disturbance usually but when it pulls hard, there is a tear in the retina in some places and through the tear fluid may pass, dislocating the retina. This condition is known as retinal detachment. This is a very serious problem and if it is left untreated, it can cause vision problems leading to blindness.
Causes:
The eyeball is filled with vitreous gel and is attached to the back portion of eyes in retina. It gets changed in shape as we age, pulled away and finally getting tore. When it gets damaged, the liquid seeps into the retina and detaches it from the back wall of eye.
Symptoms:
Some of the symptoms are: increase in number of floaters which indicates a retinal tear, appearance of flashes, shadowy appearance in vision field, decrease in vision and grey curtain appearance in vision. Floaters and flashes are common and it does not mean that you have a detachment or tear.