Active clinical trials for "Retinal Diseases"

Irregular lighting and lack of light in premature infants will affect their health, produce negative effects such as physiological and visual development, and also affect the mother's sleep and quality of life. This study is to verify the effect and delay effect of two-week premature infants' light intervention on their physiological indicators and visual development, mother's sleep quality and quality of life. It is planned to be in the Neonatal Moderate to Severe Ward of National Taiwan University Children's Hospital, and the subjects are premature babies born 32 weeks old. Divided into two groups of light intervention group and control group, longitudinal tracking intervention effect and six-week and three-month delay effect.

The investigator study evaluate the effect of different lipid lowering agents on the progression of diabetic retinopathy and other reduction of cardiovascular risk of diabetic patients

Proliferative diabetic retinopathy(PDR) is the leading cause of visual loss in diabetic patients. Operation is an efficient method to treat PDR. Anti-vascular endothelial growth factor (anti-VEGF) can be used as an adjuvant therapy which can make operation more easy.

The Retinopathy of Prematurity (ROP) is a Retina's pathology only of the premature baby, it's characterized for proliferation of vascular tissue that grow in the limit between the vascular retina and the avascular retina. The altered regulation of Vascular Endothelial Grow Factor (VEGF) has been proposed as one of the principal factor in the pathogenesis of the ROP. The ROP is classified for: location (zones I,II,III), extension (hours 1 to 12) and for stages (1,2,3,4a,4b,5) and features of the vessels (normal, pre-plus and plus). With the diagnosis of ROP type 1(ROP zone I any stage with plus, zone I stage 3 without plus, zone II stage 2 y 3 with plus) the treatment is begun and ROP type 2 is maintained in observation. The altered regulation of Vascular Endothelial Grow Factor (VEGF) has been proposed as one of the principal factors in the pathogenesis of ROP.

Homocysteine, a well-known inducer of vascular endothelial cell damage has been associated with extracellular matrix changes. Many studies demonstrated that high levels of this aminoacid in diabetic patients increases significantly the risk of the development of this pathology. This study has been undertaken to investigate the role of homocysteine and its cofactors (folic acid, vitamin B6 and B12) during the progression of the diabetic retinopathy.

Retinal neovascularization of diabetic retinopathy might be associated with genetic risk factors and environmental risk factors.

To evaluate the fluorescein angiographic and visual acuity effects of a single intravitreal injection of ranibizumab for the management of persistent new vessels associated with diabetic retinopathy.

This study investigates the hypothesis that ranibizumab injection given into the eye is a safe, efficacious and helping treatment option applied before surgical intervention of the proliferative diabetic retinal eye disorder.

The purpose of this study is to evaluate the optic nerve head changes consequent to panretinal photocoagulation done for diabetic retinopathy.

There is evidence from a variety of animal studies that choroidal blood flow is under neural control. Recent results in humans indicate that a light/dark transition is associated with a short lasting reduction in choroidal blood flow. Several observations indicate that the changes in choroidal perfusion are triggered at least in part by neural mechanisms. Particularly, we have shown that during unilateral dark/light transition both eyes react with choroidal vasoconstriction strongly indicating a neural mechanism for blood flow regulation. Investigation of changes in choroidal blood flow during light/dark transition may represent an interesting approach to study neural dysregulation at the level of the eye in patients with IDDM. Accordingly, the hypothesis of reduced choroidal blood flow responses to a light/dark transition in patient with IDDM will be tested. This response in choroidal blood flow will be correlated to parameters of diabetic neuropathy and diabetic retinopathy.