Dawson et al published criteria for evaluating a patient with trachoma. These can help to determine the severity of the infection and the risk of disability. This was published through the World Health Organization (WHO).
Parameters (5):
(F) – upper tarsal follicles, centrally located
(P) – upper tarsal papillary hypertrophy and diffuse infiltration in the upper tarsus
(C) – conjunctival scarring
(T/E) – trichiasis (eyelashes) or entropion
CC – corneal scarring
Items C, T/E and CC can result in permanent disability.
|
Parameter |
Finding |
Points |
|
follicles, upper tarsal |
none |
F0 |
|
|
1 to 4 |
F1 |
|
|
5 to 9 |
F2 |
|
|
10 or more |
F3 |
|
papillary hypertrophy |
normal |
P0 |
|
|
minimal, does not obscure vessels |
P1 |
|
|
moderate, vessels appear hazy |
P2 |
|
|
pronounced, vessels hidden over more than half of surface |
P3 |
|
conjunctival scarring |
none |
C0 |
|
|
mild, fine and scattered |
C1 |
|
|
moderate |
C2 |
|
|
severe, with distortion of upper tarsus |
C3 |
|
trichiasis/entropion |
none |
T/E0 |
|
|
lashes deviated inward but do not touch the globe |
T/E1 |
|
|
lashes touch the globe but do not rub against the cornea |
T/E2 |
|
|
eyelashes constantly rubbing against cornea |
T/E3 |
|
corneal scarring |
none |
CC0 |
|
|
minimal, with clear central cornea and visual axis not affected |
CC1 |
|
|
moderate |
CC2 |
|
|
severe, central scarring or opacity that obscures the pupillary margin |
CC3 |
Specialty: Infectious Diseases, Obstetrics & Gynecology, Urology
ICD-10: ,
