Ocular Delivery Systems: Transscleral Drug Delivery to the Posterior Eye Segment
INTRODUCTION Retinal diseases, such as age-related macular degeneration (AMD), diabetic retinopathy, and glaucoma, are the most common causes of visual impairment in the industrial world. These diseases are most prevalent among the elderly people, and they are becoming more common as the number of old people continuously increases. It is expected that the number of patients will increase so that in the United States alone there will be 30 million patients affected by the AMD. Ever increasing prevalence of diabetes increases also the number of retinal complications. In the near future, large numbers of patients need pharmaceutical treatment of the retinal diseases (1).