|LETTER TO EDITOR
|Year : 2004 | Volume
| Issue : 1 | Page : 84-85
Source of Support: None, Conflict of Interest: None
|How to cite this article:
Venkatesh R. Letter. Indian J Ophthalmol 2004;52:84-5
We read with great interest the article by Fogla and Rao on ophthalmic photography using a digital camera. The authors must be commended for their efforts. We are also using a digital camera for the same purposes as reported by the authors and would like to share a few practical tips based on our experience. In patients with corneal problems like infiltrates and uclers, it may sometimes be very difficult to hold the eyelids apart (even with the assistance of a paramedic) to take photographs. In such cases, the use of a simple lid retractor or wire speculum can help the physician take good clinical pictures. A drop of local anesthetic will also make patient more comfortable with facing the bright diffuse light of the slitlamp.
For extreme close-up photography of the external eye, even with a macro close-up mode it is difficult and time consuming to get a clear focus. In order to avoid these problems, we have fitted a +10 dioptre lens to the plastic container of the Kodak film roll, which can in turn be easily fitted to the camera to get clearer magnified pictures, without using the macro close-up mode [Figure - 1]A and[Figure - 2]. For slitlamp and microscope photography, our instrument maintenance lab has developed cost-effective "coupling devices" made of brass, which can be inserted into the eye piece of the slitlamp/microscope, with the other side "threaded" on to the camera lens [Figures 1]B and C. The thread is already available on the camera (Nikon Coolpix 950) for fitting a UV filter lens. As a result pictures can be comfortably taken without supporting the camera [Figure - 3].
Glaucoma specialists have found it particularly helpful to take pictures of the optic disc and store them for future use. Initially it was difficult to do this with the slitlamp using a 78D or 66D lens, but we trained our paramedic to hold the lens at a particular distance from the eye, allowing us to take pictures more comfortably. However, we agree with the authors that the best way to take fundus pictures (especially the optic disc) is with the gonio lens (Goldmann three mirror).
Digital camera pictures usually have artifacts produced by flashlight reflections on the surface of the cornea, but these can be easily removed without disturbing areas of clinical relevance using photo-editing software (e.g., Adobe Photoshop, [Figure - 2]. This technology of digital photography has also helped in routine teaching and training thereby avoiding multiple examinations of patients by our residents, and showing more concern for the patient's privacy. We foresee that the digital camera will become a part of every ophthalmic practitioner's toolkit in the future.
Fogla R, Rao SK. Ophthalmic photography using a digital camera. Indian J Ophthalmol 2003
[Figure - 1], [Figure - 2], [Figure - 3]