Convert to ICD-10-CM: 
368.13 converts approximately to:
- 2015/16 ICD-10-CM H53.149 Visual discomfort, unspecified
 ICD-9-CM Volume 2 Index entries containing back-references to 
368.13:
- Asthenopia 368.13
- Discomfort visual 368.13 visual 368.13
 
- Eyestrain 368.13
- Photophobia 368.13
- Strain - see also Sprain, by site eye NEC 368.13 eye NEC 368.13