| DREAM OCT VG200D | ||
|---|---|---|
| OCT Imaging | ||
| Methodology | Swept-Source OCT | |
| OCT Central wavelength | 1030~1070 nm | |
| Scan speed | 200 kHz (200,000 Hz) | |
| Axial resolution (Optical) | 5.5 μm | |
| Lateral resolution (Optical) | 15 μm | |
| A-scan depth | 1. Retina: 12 mm 2. Anterior segment: 16.2 mm |
|
| Scan Range (Retina) | 130° (26 mm) | |
| Scan range (Anterior) | 20 mm | |
| OCTA Imaging | ||
| Scan range (Retina) | 130° (26 mm × 26 mm) | |
| OCTA montage | 225° (44 mm × 42 mm) | |
| Algorithm | TRUE Angio™ | |
| Fundus Imaging | ||
| Methodology | cSLO | |
| Optical source | SLD | |
| Wavelength | 830±20 nm | |
| Field of view | 90° × 90° | |
| Others | ||
| Range of refractive compensation | -33 D ~ +40 D | |
| Alignment | Automatic / Electrical | |
| Feature | Swept-Source OCT | Spectral-Domain OCT |
|---|---|---|
| Light Source | Uses a tunable laser around 1050 nm wavelength for deeper penetration and higher stability. | Uses a broadband super-luminescent diode (~840 nm), limited in depth and more affected by scattering. |
| Imaging Depth | Exceptional penetration through retinal pigment epithelium and into the choroid — visualizing deeper layers clearly. | Limited penetration; choroidal structures often indistinct or lost in shadow. |
| Scanning Speed | Much faster data acquisition, enabling quick, high-density scans with minimal motion artifacts. | Slower capture; longer scans often suffer from motion blur and patient discomfort. |
| Image Quality | Delivers consistent high-definition images across all tissue layers, even with cataracts. | Excellent for retinal surface imaging but signal quality drops with depth or opaque media. |
| Signal Stability | Laser source provides uniform signal strength throughout scans and across follow-ups. | Signal decays with depth; performance may vary over time. |
| Performance in Media Opacity | Penetrates through cataracts, corneal haze, or vitreous hemorrhage with minimal degradation. | More susceptible to scattering; image quality declines significantly in such conditions. |
| Measurement Reliability | Provides precise, repeatable quantitative data — ideal for long-term monitoring. | Reliable for superficial layers but less consistent for deep structures. |
| Technological Maturity | Represents the latest generation of OCT innovation; future-ready and expandable. | Older, well-established technology nearing its performance limits. |
| Maintenance & Calibration | Laser-based system offers better long-term stability and reduced recalibration. | Requires frequent calibration and periodic adjustments. |
| Clinical Advantage | Enables earlier disease detection, superior visualization, and greater diagnostic confidence. | Reliable for standard retinal scans but may miss subtle or deeper pathology. |
| Overall Value | Deeper • Faster • More Detailed • Future-Proof — the clear choice for advanced eye care. | Proven but technologically limited — less suitable for comprehensive imaging needs. |
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