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Ophthalmic Images

Using smartphone flashlight as slit lamp light source

Chang, Ta C; Ziff, Matteo1

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Indian Journal of Ophthalmology: August 2020 - Volume 68 - Issue 8 - p 1658-1659
doi: 10.4103/ijo.IJO_2335_19
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In the event of a power outage, the smartphone flashlight may be used as a light source for the slit lamp. First, the outer casing of the slit lamp tower is removed [Fig. 1], followed by the removal of the bulb and the condensing lens [Fig. 2]. The phone flashlight is turned on, centered over the slit apparatus and taped in place [Figs. 3 and 4]. This produces a bright slit beam of adjustable height/width comparable to that of the original bulb. The cobalt blue filter can be applied as needed. This low-cost setup may be useful in an emergency when the power outage occurs unexpectedly when there is a bulb malfunction without an adequate replacement, or in areas of low resources during electricity rationing.[1]

Figure 1
Figure 1:
The outer casing of the slit lamp tower is removed
Figure 2
Figure 2:
The bulb and condensing lens are removed
Figure 3
Figure 3:
Smart phone flashlight is turned on, centered over the slit apparatus and taped in place
Figure 4
Figure 4:
A bright, adjustable slit beam is produced

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.

Reference

1. Furdová A, Krčméry V, Horkovičová K, Furdová A, Sláviková T. Technical options of documentation of the anterior segment and the eye fundus findings within mission Cesk Slov Oftalmol. 2016;72:86–90
© 2020 Indian Journal of Ophthalmology | Published by Wolters Kluwer – Medknow