What causes floaters in the eye, and how effective is laser treatment for floaters?
My mum is 49 years old and she saw a floating object in her eye today. It occured suddenly. What might the floater be? How effective is laser treatment for floaters, as compared to other types of treatments?
Our eyes are divided into 2 main compartments, a smaller one in front, and a larger one behind, separated by the lens. Any particle/ opacity in the rear compartment will cause a shadow to be cast on the retina, resulting in the visual perception of floaters.
The rear compartment is filled with a firm gel (vitreous) which is normally transparent. As we age, the gel degenerates and liquefies, and some undissolved gel particles may remain within the cavity. As light enters the eye, these particles cast shadows on the retina, resulting in floaters. This can happen spontaneously, or after vigorous rubbing of your eye, being hit in the eye etc. This is by far the most common cause of floaters, and is termed posterior vitreous detachment (or PVD).
Occasionally, floaters can be due to other particles in the cavity such as pigment cells, red blood cells, or white blood cells. Conditions such as a retinal tear, bleeding (from abnormal blood vessels) or infections and inflammatory conditions can also lead to floaters.
It is important therefore for your mother to be seen by an Ophthalmologist to determine the cause of the floaters. Retinal tears may require laser treatment to prevent a more serious condition known as retinal detachment from happening. A PVD is usually left untreated as it is harmless. Although visually irritating, most people get used to the presence of floaters after a period. The floaters will usually get less obvious with time, but may not completely disappear.
More importantly, after the initial visit to determine the cause of the floaters, your mother should seek prompt attention by an Ophthalmologist should she suddenly experience a dramatic increase in the number of floaters. This may be a symptom of a new problem (such as a retinal tear or bleeding) happening.
I hope your mum is feeling better!