High quality slit-lamp images are now possible on the move with Keeler's latest attachment. Bill Harvey tries it out
The metal attachment into which the phone fits is simply slid onto an eyepiece once the protective rubber sleeve has been removed (Figure 2). A counterweight is inserted in the focusing rod hole to make the whole thing balance better when held. And that is it - you can now take images and movies of eyes in domiciliary settings (or indeed anywhere where a portable system is needed). The image quality is dictated by whether you have the iPhone 4 (5 megapixel) or the 4S (8 megapixel).
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