The Common Toxicity Criteria (CTC) define adverse events following cancer therapy. It was designed for use in clinical trials of different therapeutic regimens. It can be used to grade adverse effects affecting the eyes and vision.
Types of auditory or hearing adverse events:
(1) cataract
(2) conjunctivitis
(3) dry eye
(4) glaucoma
(5) keratitis (corneal inflammation with/without corneal ulceration)
(6) tearing (watery eyes)
(7) blurred vision
(8) double vision (diplopia)
(9) flashing lights, floaters
(10) night blindness (nyctalopia)
(11) photophobia
(12) other ocular or visual disturbance
Grade 0: normal or no change
Type of Adverse Event |
Finding |
Grade |
cataract |
asymptomatic |
1 |
|
partial visual loss |
2 |
|
visual loss requiring treatment or interfering with function |
3 |
conjunctivitis |
abnormal ophthalmologic changes but asymptomatic |
1 |
|
symptomatic without visual impairment |
1 |
|
interferes with function but does not interfere with activities of daily living |
2 |
|
interferes with activities of daily living |
3 |
dry eye |
mild, not requiring treatment |
1 |
|
moderate or requiring artificial tears |
2 |
glaucoma |
increase in intraocular pressure but no visual loss |
1 |
|
increase in intraocular pressure with retinal changes |
2 |
|
visual impairment |
3 |
|
unilateral or bilateral loss of vision (blindness) |
4 |
keratitis |
abnormal ophthalmologic changes but asymptomatic |
1 |
|
symptomatic without visual impairment |
1 |
|
symptomatic and interfering with function but not with activities of daily living |
2 |
|
interferes with activities of daily living |
3 |
|
unilateral or bilateral loss of vision (blindness) |
4 |
tearing |
mild, not interfering with function |
1 |
|
symptomatic and interfering with function but not with activities of daily living |
2 |
|
interferes with activities of daily living |
3 |
blurred vision |
symptomatic and interfering with function but not with activities of daily living |
2 |
|
interferes with activities of daily living |
3 |
double vision |
symptomatic and interfering with function but not with activities of daily living |
2 |
|
interferes with activities of daily living |
3 |
flashing lights, floaters |
mild, not interfering with function |
1 |
|
symptomatic and interfering with function but not with activities of daily living |
2 |
|
interferes with activities of daily living |
3 |
night blindness |
abnormal electroretinography but asymptomatic |
1 |
|
interferes with function but not with activities of daily living |
2 |
|
interferes with activities of daily living |
3 |
photophobia |
symptomatic and interfering with function but not with activities of daily living |
2 |
|
interferes with activities of daily living |
3 |
other disturbance |
mild |
1 |
|
moderate |
2 |
|
severe |
3 |
|
unilateral or bilateral loss of vision (blindness) |
4 |
Specialty: Hematology Oncology, Ophthalmology