A four-piece all-aspheric adapter fisheye lens includes a negative meniscus lens, a biconcave lens, a positive meniscus lens, and a biconvex lens. Here, as liquefied petroleum gas is highly inflammable, it is important to have an indicator that quickly determines whether there is leakage. When at least a portion of the lens is exposed to an appropriate stimulus, the refraction modulating composition forms a second polymer matrix. Collections of geofeed content items may be curated in order to organize and follow geofeed content items of interest. By performing a lithography process, both a side frame, having at least one slit, and multiple photoresist spacers are formed on the alignment layer.