الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
 |  | from | 32 |  |  |
| | | from | 32 | | |
Abstract
Vitreous floaters may occur in normal eyes as well as in eyes of patients with vitreo-retinal disorders. They may also develop after cataract extraction and IOL implantation. They are tiny or large, cloudy clumps of gel or cells that appear in the otherwise clear vitreous. Floaters may cause symptoms depending on their size, density, mobility, and proximity to the retina.
The most common cause of floaters are PVD, vitreous syneresis, and asteroid hyalosis, which are generally a result of normal aging or past trauma.
People complain that they see small specks, cobwebs, lines or clouds moving in their field of vision.The specks appear to be in the air out in front of the eye because they cast a shadow on the retina. They are seen by nearly everyone and range from being a nuisance that can be ignored, to floaters interfering with essential daily activities such as reading, driving and using a computer.
Techniques to characterize floaters clinically include assessment through ultrasound imaging, OCT, and DLS for structural characterization. Functional impact can be assessed by contrast sensitivity testing.Most importantly, primary floaters have to be distinguished from secondary floaters caused by an underlying ocular pathology, such as uveitis, vitreous hemorrhage, asteroid hyalosis or amyloidosis.
Patients with clinically annoying floaters have limited treatment options: Nd: YAG laser vitreolysis or vitrectomy. Higher success rate in removing floaters achieved with vitrectomy.However, the intra-operative and post-operative complication rates were great risks in the 20 G PPV.