The ability of physicians to screen for AIDS-related cytomegalovirus r
etinitis (CMVR) was studied at a London AIDS centre. Patients had unde
rgone direct ophthalmoscopy as part of their general examination by th
e physicians and were referred if fundal abnormalities were found, if
a focus of extra-ocular CMVR was present or if the patient complained
of visual symptoms. The provisional diagnoses of the physicians were c
ompared with the final diagnoses of the ophthalmologists. Of 348 conse
cutive patients referred for an ophthalmic opinion, the physicians mad
e the correct diagnosis in 69% of those referred with a provisional di
agnosis of CMVR, in 66% of those with normal fundi and in 81% of those
with toxoplasma chorioretinitis. Those cases of CMVR which were misdi
agnosed by the physicians were usually mistaken for other retinal path
ology which would warrant a specialist referral. Screening for CMVR in
HIV-positive and AIDS patients may safely be undertaken by physicians
familiar with the ocular manifestations of HIV-related disease.