Other Tests Available at the Retina Center (Photography Department)

Stratus OCT (Zeiss-Humphrey, Dublin, CA)

Optical coherence tomography (OCT) is a non-invasive imaging tool which is capable of taking cross-sectional (longitudinal) scans of the retina and optic nerve. Several types of scans are possible with this machine, allowing us to map the retinal thickness, measure the retinal nerve fiber layer, and determine the optic nerve head parameters, among others.

180-degree OCT scan through the fovea, showing cystic spaces intraretinally.

90-degree OCT scan through the fovea, showing cystic spaces intraretinally.

Retinal thickness map of above patient, showing the area of thickening.

Retinal Nerve Fiber Layer (RNFL) scan

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Heidelberg Retinal Tomography II (HRT II, Heidelberg Engineering, Germany)

The HRT uses a confocal scanning system to acquire 3-dimensional images of the optic nerve and retina. This data is used for retinal thickness measurements as well as topographic optic nerve head analysis.

Heidelberg Retinal Angiography 2 (HRA 2, Heidelberg Engineering, Germany)

The HRA 2 uses confocal laser scanning to acquire digital fluorescein angiography (FA) and indocyanine green angiography (ICG) with 3-dimensional resolution.

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Previous Machines Tested

Nidek NM-200D - Non-Mydriatic Portable Retinal Camera
Nidek MP1- Non-Mydriatic Automated Microperimetry

Canon Laser Blood Flowmeter 100 (Canon)

The Canon Laser Blood Flowmeter used a sophisticated tracking device and the Bidirectional Laser Doppler Velocimetry principle to monitor changes in retinal blood vessel diameter, velocity and blood flow.

This instrument was most useful for patients with retinal vascular disease or systemic vascular or hematologic disease that could affect the retina. It could reveal lesions at risk for developing sudden vascular accidents (“strokes”) as a complication of diabetes, hypertension, or blood dyscrasia. It could also be used to monitor the clinical course of eye diseases like central retinal artery or vein occlusion, as well as arterial or venous branch occlusions.

Image Seen Through Canon Laser Blood Flowmeter 100

Sample Doppler Velocity Analysis

Sample Serial Blood Flow Chart in patient with hyperviscosity syndrome under therapy

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Panoret 1000 - Medibell Lab

Like the RetCam 120, the Panoret 1000 was a high-resolution wide-field digital retinal camera performed with the patient lying down and facing up. It differed from the former in that dilation of the eye was not required, photographic lighting was based on transcleral illumination, and resolution was much higher (1000 x 1000 pixels). It was able to produce color and monochromatic images in panoramic or magnified modes. Monochromatic images could highlight features at the surface of the retina, or deeper in the choroid. It could likewise be used for fluorescein angiography.

The prototype of the Panoret 1000 underwent rigorous clinical testing at the Advanced Retinal Imaging Laboratory and based on our feedback, significant changes for improvement were eventually incorporated into the commercial units.