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The slit lamp was invented at the beginning of the 20th century to visualise the anterior and middle segments of the eye more accurately.1 2 A major advance in its use in clinical practice was the introduction of strong plus lenses (eg, +60, +78, +90 D) to allow biomicroscopy of the fundus.3 I present an extended use of the slit lamp, enabling it to give an appropriate photographic record of nearly every morphological aspect occurring in an ophthalmological practice.
The plane of sharp focus in a slit lamp is located at a distance of ∼10 cm in front of its objective. If the patient moves away from the chin rest, the picture fades, leaving the examiner with a …
Competing interests: None.
Patient consent: Obtained.