Indian Journal of Ophthalmology

: 2020  |  Volume : 68  |  Issue : 8  |  Page : 1658--1659

Using smartphone flashlight as slit lamp light source

Ta C Chang1, Matteo Ziff2,  
1 Bascom Palmer Eye Institute, Miami, FL, USA
2 Mongoose Enterprises, Miami, FL, USA

Correspondence Address:
Dr. Ta C Chang
Bascom Palmer Eye Institute, 900 NW 17th Street, 450N, Miami, FL 33136

How to cite this article:
Chang TC, Ziff M. Using smartphone flashlight as slit lamp light source.Indian J Ophthalmol 2020;68:1658-1659

How to cite this URL:
Chang TC, Ziff M. Using smartphone flashlight as slit lamp light source. Indian J Ophthalmol [serial online] 2020 [cited 2020 Sep 23 ];68:1658-1659
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Full Text

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 [Figure 1], followed by the removal of the bulb and the condensing lens [Figure 2]. The phone flashlight is turned on, centered over the slit apparatus and taped in place [Figure 3] and [Figure 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 2}{Figure 3}{Figure 4}

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Conflicts of interest

There are no conflicts of interest.


1Furdová 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.