Track topics on Twitter Track topics that are important to you
The purpose of this study is to compare standard automated perimetry (SAP) using the Heidelberg Edge Perimeter (HEP) with the Octopus Visual Field (OVF) analyzer and determine test-retest reliability of both parameters in detecting glaucomatous visual field losses.
After obtaining informed consent, each patient will undergo the following tests:
1. Standard ophthalmic examination (usual care): Best-corrected visual acuity testing, slit lamp biomicroscopy, Goldman applanation tonometry, corneal thickness measurement and fundoscopy.
2. G-top strategy using the OVF Analyzer (G-Top, Koeniz, Switzerland). The MD, PSD will be recorded.
3. HEP SAP using the advanced staircase thresholding algorithm (ASTA). This will be performed once. The MD and PSD will be recorded.
4. Spectralis OCT using the GMPE program will be performed once in a non - dilated condition. The RNFL thickness in 6 sectors (SN, ST, IN, IT, N and T) along with the structure-function correlation will be recorded.
The investigators will randomize the order of the HEP SAP III and the OVF, and the order of the eye tested (right vs. left) if both eyes of the patients meet the inclusion criteria. Forty eyes (40) of patients with glaucoma will be randomly chosen from this group and will be asked to return in 3-6 month for retesting HEP and OVF.
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Diagnostic
Heidelberg Edge Perimeter, Octopus Visual Field
Active, not recruiting
Published on BioPortfolio: 2015-08-18T20:08:23-0400
It is hypothesized that performing VF measurements with a Virtual Reality headset using similar testing strategies as implemented in conventional perimeters, allow for a non-inferior quali...
The purpose of this study is to compare three perimetric techniques regarding progression of the visual field.
Perimetry is a well-established method that is used to measure the visual field functions of humans. Commercially available products, such as the OCTOPUS 900 (Haag-Streit AG, Koeniz, Switz...
Visual impairment can affect up to 70% of stroke survivors, but many do not have their vision adequately assessed in hospital. An unidentified visual defect can cause significant problems ...
This is a single center, prospective study to evaluate the efficacy and reproducibility of frequency doubling technology (FDT)-based visual field devices compared to conventional Humphrey ...
We study the topological properties of finite-size S-shaped graphene junctions with distinctive edge features subjected to the perpendicular magnetic field, using the tight-binding model. The quantum ...
To evaluate the accuracy of the measurement of the ganglion cell layer (GCL) of the posterior pole analysis (PPA) software of the Spectralis spectral-domain (SD) optical coherence tomography (OCT) dev...
The Octopus endovascular strategy involves placement of multiple, stacked bifurcated grafts in the thoracic segment of a TAAA to facilitate deployment of multiple parallel covered stents for visceral ...
Our aim is to develop a new generation of suprachoroidal-transretinal stimulation (STS) retinal prosthesis using a dual-stimulating electrode array to enlarge the visual field. In the present study, w...
To study visual processing, it is necessary to precisely control visual stimuli while recording neural and behavioral responses. It can be important to present stimuli over a broad area of the visual ...
Partial or complete loss of vision in one half of the visual field(s) of one or both eyes. Subtypes include altitudinal hemianopsia, characterized by a visual defect above or below the horizontal meridian of the visual field. Homonymous hemianopsia refers to a visual defect that affects both eyes equally, and occurs either to the left or right of the midline of the visual field. Binasal hemianopsia consists of loss of vision in the nasal hemifields of both eyes. Bitemporal hemianopsia is the bilateral loss of vision in the temporal fields. Quadrantanopsia refers to loss of vision in one quarter of the visual field in one or both eyes.
A localized defect in the visual field bordered by an area of normal vision. This occurs with a variety of EYE DISEASES (e.g., RETINAL DISEASES and GLAUCOMA); OPTIC NERVE DISEASES, and other conditions.
Repetitive visual hallucinations experienced mostly by elderly with diminished visual acuity or visual field loss, with awareness of the fictional nature of their hallucinations. It is not associated with delusions and other sensory hallucinations.
A subjective visual sensation with the eyes closed and in the absence of light. Phosphenes can be spontaneous, or induced by chemical, electrical, or mechanical (pressure) stimuli which cause the visual field to light up without optical inputs.
An ocular disease, occurring in many forms, having as its primary characteristics an unstable or a sustained increase in the intraocular pressure which the eye cannot withstand without damage to its structure or impairment of its function. The consequences of the increased pressure may be manifested in a variety of symptoms, depending upon type and severity, such as excavation of the optic disk, hardness of the eyeball, corneal anesthesia, reduced visual acuity, seeing of colored halos around lights, disturbed dark adaptation, visual field defects, and headaches. (Dictionary of Visual Science, 4th ed)
Ophthalmology is the branch of medicine that is devoted to the study and treatment of eye diseases. As well as mild visual defects correctable by lenses, ophthalmology is concerned with glaucoma, uveitis and other serious conditions affecting the eye, ...