OCULUS Smartfield


The OCULUS Smartfield is a compact visual field device purposefully optimized for monitoring functional impairment in glaucoma. Based on an ultra-high-luminance LCD screen it performs standard automated perimetry of the central visual field and beyond. Despite its small size, the Smartfield perimeter offers a comprehensive clinical solution in visual field testing for any glaucoma practice.

Increased Diagnostic Reliability

Powerful test strategies such as SPARK and other assessment tools contribute to the great diagnostic utility of the Smartfield perimeter. The enhanced Glaucoma Staging System (GSS 2) of Dr. Brusini and the Glaucoma Staging Program (GSP) offer extended support in single field analysis. Structure-function relationships are predicted by the new PATH evaluation module. The Threshold Noiseless Trend (TNT) module performs efficient progression analysis. Examination quality is ensured by a patented fixation control algorithm, a high resolution video camera for eye monitoring and the various built-in catch trials.


Examination Programs

The Smartfield is equipped with a set of predefined programs for the most frequently needed examination routines of the central visual field or the macular area. A default program for the

Examination Programs of the OCULUS Smartfield perimeterperiphery  is also included. The program list can be easily extended according to specific requirements by combining the available test patterns and test strategies.

Test Strategies of the OCULUS Smartfield perimeter

OCULUS Test Strategies

The Smartfield features the innovative SPARK test strategy for faster and more stable threshold measurements in glaucoma patients. Rounding off the testing capabilities of the Smartfield is the complete

set of traditional OCULUS test methods, including threshold and suprathreshold strategies. The classical 4-2 dB staircase strategy (Threshold) uses two reversals in the patient’s answer to deliver a threshold value in each tested point. The OCULUS Fast Threshold strategy is a clever improvement over the classical procedure which reduces examination time by using variable steps and taking advantage of already measured locations. Suprathreshold strategies like the 2-zone or 3-zone strategy offer a quick overview of the visual field.

Results Printout

Measurement results of the Smartfield perimeter are commonly summarized in a standard printout. For suprathreshold tests a qualitative overview is printed, whereas for threshold examinations all clinically relevant data are shown in various representations. Besides the standard printout the Smartfield software features various assessment displays.



SPARK Strategy

OCULUS perimetry software: SPARK Strategy
The Spark strategy uses the correlation between different points in Glaucomatous visual fields to considerably expedite the examination.

OCULUS perimetry software: Glaucoma Staging System (GSS 2) per Brusini
Display of the GSS 2 assessment
OCULUS perimetry software: Glaucoma Staging Program (GSP)
GSP analysis of a pre-perimetric examination finding
OCULUS perimetry software: Threshold Noiseless Trend (TNT) Progression Analysis
TNT Display

Predicting Anatomy from Thresholds (PATH)

Functionality of a retinal location obviously depends on the underlying anatomical structure of the retina in that location. One characteristic feature of glaucoma is that there is a close connection between sensitivity levels of given retinal locations (as described by visual field measurements) and anatomical structures related to the optic nerve head. The merit of PATH is that it provides an estimate of the retinal nerve fibre layer (RNFL) thickness around the optic nerve head and the relative area of the neuroretinal rim based solely on the results of visual field measurements performed with the SPARK examination strategy. This novel approach of predicting structure from function is made possible by the high reproducibility of the SPARK visual field exams.

Predicting RNFL thickness

Working from the results of SPARK perimetry, RNFL thickness is predicted at 25 points of the TSNIT (Temporal – Superior – Nasal – Inferior – Temporal) circle around the optic nerve head. The value at each point is calculated from functional data selected for relevance. This selection is based on an objectively automated machine learning algorithm and does not rely on other findings such as on the correspondence between nerve fibre pathways and visual field areas.

Predicting RNFL thickness with OCULUS perimetry software: PATH
Prediction of the RNFL thickness according to PATH

Predicting the relative area of the neuroretinal rim with the OCULUS perimetry software: PATH
Prediction of the relative neuroretinal rim area according to PATH
Predicting the relative area of the neuroretinal rim

A linear combination of relevant threshold results is used in order to predict the ratio between the neuroretinal rim area and the total area of the optic disc. The result is compared to normative data and expressed as a percentage of the population average value (normalized to 100%).

Technical Data

Static perimetry
Programs Pre-defined glaucoma, macula, screening and neurological tests
user-defined tests
Test patterns 30×24 (SPARK), 24-2, 10-2, customized patterns
Strategies Threshold strategies: SPARK Precision, SPARK Quick, OCULUS Fast Threshold, Full Threshold (4/2), Age-adapted suprathreshold screening (2-zone, 3-zone)
Examination speed Adaptive/fast/normal/slow/user-defined
Fixation control Through central threshold, Heijl-Krakau (using the blind spot), live video image
Result display Greyscale, dB values (absolute/relative), symbols, probabilities, 3D plot
Reports Enhanced Glaucoma Staging System (GSS 2), Glaucoma Staging Program (GSP), PATH function-structure analysis, Threshold Noiseless Trend (TNT) progression report
Stimulus viewing distance Infinity
Max. eccentricity horizontal/vertical 30°/25° (60°/50° with fixation shift)
Stimulus size Goldmann III
Stimulus colour White
Stimulus duration 200 ms/user-defined
Threshold range/step 0.8 – 3 180 cd/m2 (2.5 – 10 000 asb), 0 – 36 dB/1 dB
Background luminance 10 cd/m2 (31.4 asb)
Patient positioning Height-adjustable measuring head, adjustable chin rest, double head rest
Software Device control, patient management, backup and print software (Windows®)
Built-in networking, easy EMR-integration, DICOM compatibility
Technical specifications
Dimensions (W x D x H) 332 x 418 to 477 x 402 mm (13.1 x 16.5 to 18.8 x 15.9 in)
Weight 7.6 kg (16.8 lbs)
Max. power consumption 30 W
Voltage 100 – 240 V AC
Frequency 50 – 60 Hz
Recommended computer specifications Intel® CoreTM i5, 500 GB HDD, 8 GB RAM, Intel® HD Graphics, Windows® 10

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