Table 1.

Self- and clinician-assessed evaluation of photophobia [9]

Grade	Self-assessed photophobia	Clinician-assessed photophobia
0	No photophobia	No photophobia under the slit-lamp beam even with the largest slit beam
1	Slight difficulty with light causing occasional eye blinking	Photophobia to moderate slit-lamp beam light
2	Slight difficulty causing regular eye blinking	Photophobia to dimmest slit-lamp beam light
3	Moderate difficulty with light requiring sunglasses	Inability to tolerate the blue light
4	Severe difficulty requiring almost permanent sunglasses	Photophobia needing dark glasses and unable to open eyes inside the illuminated consulting room
5	Extreme difficulty with light requiring patient to stay inside—cannot even tolerate natural light with sunglasses	Unable to open eyes in darkened room