Oculus Centerfield 2: Enhancing Visual Field Examinations with Versatility and Precision
Since its introduction in 2004, the Oculus Centerfield 2 has garnered global recognition among ophthalmologists, optometrists, and occupational physicians. Renowned for its reliability and versatility, this table-top device is equipped with a closed design and a shaded view into the perimetric bowl, enabling visual field examinations in well-lit environments. Its practicality allows for seamless integration into various clinical settings, making it an accessible option for practitioners worldwide.
Operated by an external computer, the Centerfield 2 perimeter offers extensive configuration options to cater to the diverse needs of different practices. Its transportable nature ensures flexibility in usage, facilitating convenient deployment across various clinical settings. Additionally, the use of an external computer ensures compatibility with specific operating and analysis software, ensuring that the device remains at the forefront of evolving information technology.
One of the standout features of the Centerfield 2 perimeter is its utilization of all measurement principles, including automated static examinations and automated kinetic perimetry. This comprehensive approach enables practitioners to conduct thorough assessments, aiding in the accurate diagnosis and monitoring of visual field conditions.
Moreover, the Oculus Centerfield 2 boasts impressive networking capabilities straight out of the box. With DICOM compatibility and seamless integration with Electronic Health Records (EHR) systems, the device facilitates efficient data management and sharing, enhancing workflow efficiency and patient care.
The adaptability of the Oculus Centerfield 2 is another notable aspect, offering flexibility through versatile hardware configuration options and customizable examination programs. This adaptability ensures that the device can be tailored to suit the unique requirements of different practices and individual patient needs, further solidifying its position as a leading choice in visual field examination technology.
Sensitivity threshold plays a crucial role in visual field examinations, as it determines the luminance level at which there is a 50% probability of perception. This threshold is essential for detecting light stimuli of varying intensities, ranging from very bright spots to darker areas. The transition between these extremes occurs gradually over a specific range of luminance. In perimetry, sensitivity threshold values are typically expressed in decibels (dB), with the reference value set by the maximum stimulus luminance of the perimeter.
Various strategies are employed to measure threshold values across different locations of a visual field test pattern. The Oculus Centerfield 2 perimeter offers several methods for threshold measurements, including the classical 4-2 bracketing strategy (known as "Full Threshold"), Oculus Fast Threshold, the original CLIP strategy, and rapid SPARK. These strategies utilize interpolation techniques to accurately determine sensitivity thresholds, ensuring comprehensive assessment of visual field function.
In addition to threshold-oriented strategies, supra-threshold strategies are also utilized during visual field examinations. These strategies involve presenting stimuli that are brighter than the age-dependent normal threshold value in each location, thereby facilitating faster and easier tests. Furthermore, supra-threshold strategies provide visual field overviews without the need for numerical dB values. The Oculus Class Strategy and the 2- and 3-zone strategies are examples of supra-threshold strategies suitable for rapid screening exams using the Centerfield 2 perimeter.
Examining the periphery of the visual field beyond the central region (up to 30° eccentricity) holds significant importance for gaining a comprehensive understanding of overall visual function. While static perimetry traditionally focuses on central areas, there are compelling reasons to extend testing to the periphery. Despite its compact design, the Centerfield 2 perimeter offers the capability to assess the visual field up to 70° in all directions. This expanded testing capacity is achieved through a clever adjustment of the fixation target, allowing for the examination of extended patterns such as those seen in the Esterman test. However, it's worth noting that threshold strategies are not typically recommended for peripheral examinations.
In cases where standard automated perimetry fails to provide satisfactory results, the Oculus Centerfield 2 can resort to traditional kinetic testing. Kinetic perimetry becomes particularly valuable in patients with very low visual acuity, where it may be the only method capable of providing additional information about the visual field. This examination utilizes Goldmann size III stimuli and covers isopters within 35° of eccentricity, offering insights that may not be attainable through other testing methods.
