12 Clinical Trials for Various Conditions
The purpose of this research study is to learn more about the relationship between Obstructive Sleep Apnea (OSA) and Normal Tension Glaucoma (NTG). OSA is a nighttime disorder of the upper airway that causes an intermittent lack of oxygen while sleeping. NTG is a type of glaucoma that occurs despite the normal intraocular pressure levels, making its detection more difficult. Left untreated, irreversible optic nerve damage and extensive vision loss can result. Previous research has shown some evidence between OSA and the development of NTG. The investigators are researching whether undergoing treatment for OSA would help to improve the vascular health to the retina, and in effect, improve the early signs of visual dysfunction seen with diagnostic testing.
Glaucoma is the second leading cause of blindness and the first leading cause of irreversible vision loss worldwide. The intraocular pressure (IOP) is the only modifiable risk factor for all the spectrum of glaucoma. Reducing IOP in glaucoma increases the likelihood of preventing progression of the disease and preserving the quality of life of the patient. Although prostaglandin analogs (PGAs) and prostamides (PMs) are de facto first-line treatment options for managing glaucoma, it is a common clinical experience to see their treatment effects plateau to a level beyond which no clinically significant IOP reduction is likely. It is also common to find minimal IOP treatment effects in the following conditions: patients with normal tension glaucoma (NTG), patients with thicker central corneal thickness (CCT), and patients with higher levels of corneal hysteresis (CH). CH is a possible proxy for the ability of the scleral tissue around the optic nerve to dissipate energy away from the optic nerve fibers. Netarsudil, a rho-kinase inhibitor was recently approved by the FDA for the treatment of glaucoma and ocular hypertension. There is a paucity of research on the efficacy of netarsudil in patients with NTG, thicker CCT, and higher levels of CH. This study aims to investigate the above issues by evaluating the efficacy of netarsudil and bimatoprost in subjects with NTG, thicker corneas, and higher levels of CH. Hypotheses * Netarsudil will have non-inferior efficacy compared to Bimatoprost in treating NTG. * Corneal thickness and corneal hysteresis will reduce the efficacy of netarsudil similar to bimatoprost in NTG. * Netarsudil will change corneal thickness and corneal hysteresis similar to bimatoprost in NTG.
The objective of this study is to determine whether systemic blood pressure in the body is related to the development and progression of normal tension glaucoma in the eye. The study aims to clarify whether subjects with episodes of hypotension (low blood pressure) at night are at increased risk for sight loss and the development of normal tension glaucoma.
Low-pressure (normal tension) glaucoma is a type of open-angle glaucoma resulting in damage to the optic nerve and abnormalities of the visual field. Eye (intraocular) pressure in this type of glaucoma is not higher than that usually considered to be normal (less than 21 mmHg) for the eye. The present treatment of low-pressure glaucoma is also directed to lowering the "normal" eye pressure. Both medications in this study, brimonidine and timolol, lower eye pressure. Laboratory research over the past decade indicates the potential to treat glaucoma not only by lowering eye pressure, but with treatments aimed at the damage occurring at the optic nerve. One group of drugs, selective alpha2-adrenergic agonists, have been shown in laboratory animals to protect against the effects of nerve damage following local stroke. Brimonidine, one of the medications in the current study, is a selective alpha2-adrenergic agonist which protects against damage to optic nerve in animal models of glaucoma.. The hypothesis of the present study is that brimonidine eye drops provide protection to the damaged optic nerve independent of lowering eye pressure in patients with low-pressure glaucoma. This will be determined by (1) measuring eye pressure, (2) performing visual field examinations, and (3) examination of the optic nerve.
A randomized, multicenter, investigator-masked prospective study of NTG patients currently on latanoprost 0.005% monotherapy, to study the effect of IOP change with the introduction of netarsudil 0.02% vs brimonidine 0.1%. Subjects will be assessed at a screening visit, and 1 follow-up visit. Clinical evaluations will include visual acuity and IOP .
A randomized active-controlled multi-site double-masked 28 day study to evaluate the safety and tolerability of QLS-101 versus timolol maleate Preservative Free (PF) 0.5% ophthalmic solution in subjects with normal tension glaucoma
The purpose of this study is to evaluate the effect of Ginkgo biloba extract (GBE) on the number of blood vessels in the back of the eye as well as the amount of blood flow at the nailfold(where the fingernail meets the skin) of the 4th finger in the hand.This finger, along with the 5th finger, has the most transparent skin, which makes imaging a little easier. GBE is an over-the-counter pill, made from a natural powder taken from the Gingko (Maidenhair) tree, that is widely used. A technique called Optical Coherence Tomography Angiography (OCTA),will be used to measure the small blood vessels at the back of the eye, the macula (the area of sharpest vision), and the optic disc (the point at which the nerve fibers from the retina enter to form the optic nerve, which transmits visual impulses to the brain).
Purpose: To study the feasibility of a larger study by determining the tolerability of measuring blood pressure (BP) and intraocular pressure (IOP) over 24 hours in an ambulatory fashion with automatic devices. Participants: 20 patients with moderate to severe normal tension glaucoma and 20 non-glaucomatous patients. Procedures (methods): Both BP and IOP will be measured automatically in each participant in an ambulatory fashion during a 24-hour period. BP will be monitored using an appropriately sized cuff Oscar 2 (Suntech Medical, Morrisville, NC), which will be placed by a person trained in ambulatory BP monitoring devices. The device will be set up to automatically inflate every 30 minutes during the day and every hour during the night to measure and record the BP. IOP will be measured using Sensimed Triggerfish contact lens (Sensimed AG, Lausanne, Switzerland); the measurements will be taken and recorded every 10 minutes. The contact lens will be inserted by eye doctors (investigators). Both monitoring devices will be removed the following day.
The primary purpose of this study is to determine whether topical ophthalmic anesthetics lower the intraocular pressure in the eye.
The goal of this clinical trial is to learn if a new contact lens device can record patterns in eye pressure for 24 hours in adults with glaucoma and in healthy participants. The main questions it aims to answer are: * Is the contact lens device able to detect patterns in eye pressure that happens naturally between nighttime and daytime? * Are the contact lens recording patterns similar when repeated one week later? * What eye problems do participants have when wearing contact lens for up to 24 hours? Researchers will compare if the recordings detected by the contact lens over 24 hours are similar to the patterns measured by an eye pressure measuring instrument used in a doctor's office. Participants will * Wear contact lens in one eye for up to 24 hours * Take recordings in that eye with smartphone camera every 15 minutes when awake * For those participants who are able to stay overnight at a hotel for the trial, researchers will measure the eye pressure in the other eye every 1 to 2 hours when awake with an eye pressure measuring instrument.
The CATS Tonometer prism clinical study is intended to determine repeatability of intraocular pressure measurement in human corneas which have undergone a LASIK procedure when compared to a standard Goldmann prism, validating the human LASIK eye findings comparing CATS Tonometer and Goldmann prisms to intracameral pressure in cadaver eyes.
This study evaluates the possible acute changes in peripapillary blood flow after instillation of antiglaucoma medications in patients with primary open angle glaucoma (POAG), normal tension glaucoma (NTG), or ocular hypertension (OHTN) using Optical Coherence Tomography (OCT) angiography.