Table 1.
Comparison of different imaging modalities for retinopathy of prematurity imaging
| Imaging modality | Field of view | Setting for use | Staffing requirement | Advantages | Disadvantages |
|---|---|---|---|---|---|
| SROP camera Condensing lens • +20D • +28D • +40D (attached with MIIRETCAM device) |
46 degree 53 degree 90 degree |
• Special care baby unit • Outpatient department • Theatre |
• Ophthalmologist • Nursing staff to hold baby and monitor vital signs. |
• Non-contact based • Portable • Wide field of view • Cost effective • Able to image till ora serrata through sclera depression • High-resolution images |
• Only colour imaging available |
| NIDEK Camera[3] | 30 degree | • Special care baby unit • Outpatient department • Theatre |
•Ophthalmologist | • Non-contact based • Portable |
• Low resolution images • Narrow field of view • Only colour imaging available • Unable to image till ora serrata |
| Video indirect ophthalmoscopy[3] | 53 degrees (28D lens) 46 degrees (20D lens) |
• Special care baby unit • Outpatient department • Theatre |
• Ophthalmologist • Nursing staff to monitor vital signs |
• Non-contact based • Portable • Cost effective • Able to image till ora serrata through scleral indentation |
• Low resolution images • Only colour imaging available |
| 3Netra Neo widefield camera[13] | 120 degrees | • Special care baby unit • Outpatient department • Theatre |
• Ophthalmologist • Nursing staff to monitor vital signs |
• Portable • Wide fundal field of view • Fast image acquisition |
• Contact based • Heavy weight camera • Unable to image out to ora serrata • Costly |
| RetCam Widefield camera[14,15] | 130 degrees | • Special care baby unit • Outpatient department • Theatre |
•Ophthalmologist • Nursing staff to monitor vital signs |
• Portable • Wide fundal field of view • Fast image acquisition • Colour and fluorescein angiographic imaging available |
• Contact based • Heavy weight camera • Sedation or general anaesthesia essential only for high quality angiograms • Unable to image out to ora serrata • Costly |
| Optos ultrawidefield camera[17] | 200 degrees | • Outpatient department | •Ophthalmologist • Nursing staff to monitor vital signs • Ophthalmic photographer |
• Non-contact based • Fast image acquisition • High resolution images • Widel field of view • Colour and angiographic imaging available • No sedation required |
• Non-portable • Unable to image out to ora serrata • Costly • Ophthalmic photographer needed for image capture |