Of late, I've been seeing flashes of light at the corner of my left eye when driving at night. At first, I thought that my prescription glasses needed checking but when I removed my glasses, the flashes were still there. I then sought advice from Dr. Google who informed me that it could be due to either (1) ocular migraine or (2) torn retina. Whilst (1) is just a mere nuisance, (2) could potentially lead to permanent blindness.
A check with an Opthalmologist confirmed that I had a condition called PVD (posterior vitreous detachment). What on earth is this beast called PVD? The Opthalmologist patiently explained it thus:
When we look at something, light passes through the front of
the eye, and is focused by the lens onto the retina. The retina is a delicate
tissue coating the inside of the eye. It converts the light into electrical
signals that travel along the optic nerve to the brain. The brain interprets
these signals to 'see' the world around us.
The eye is filled with a clear jelly-like substance called
the vitreous gel. Light passes through the vitreous gel to focus on the retina.
When the vitreous jelly comes away from the retina this is called a vitreous
detachment. The movement of the vitreous away from the retina at the back of the eye creates a tug on the retina. The retina reacts by sending a small electrical charge to your brain. You see this as short, small, flashes of light.
The cure? None. The coming away of the vitreous gel from the retina is a process that can take to about 6 months. When this evolution is complete, normal sight is restored. However, if the following symptoms appear, then a visit to the Opthalmologist is mandatory; if not immediately, at least within the next 24 hours:
The cure? None. The coming away of the vitreous gel from the retina is a process that can take to about 6 months. When this evolution is complete, normal sight is restored. However, if the following symptoms appear, then a visit to the Opthalmologist is mandatory; if not immediately, at least within the next 24 hours:
- A sudden appearance of floaters or an increase in their size and number.
- Flashes of light and/or a change/increase in the flashing lights you experience.
- Blurring of vision.
- A dark "curtain" moving up, down or across your vision, as this may mean that the retina has already partially detached.
