If not, the specialist can take a closer look at your eyes with a lighted microscope called a slit lamp and use a special dye, called a fluorescein stain, to highlight the scratch on magnification. If ...

The PSL Slit Lamp weighs only about 1.5 lbs. (0.68 kg) with its battery and fits easily and comfortably in your hand. Its ergonomic design and convenient carrying case make it an ideal instrument ...

Department of Chemistry, National Tsing Hua University, Hsinchu 300044, Taiwan ...