Detachment of the choroid is a common occurrence after operations for the relief of intra-ocular pressure. It is probably also more frequent after cataract extraction than one realizes, many such cases being over-looked and recovery taking place during the healing process.
Hemorrhage beneath the choroid from like causes also occurs, but its results are usually disastrous, necessitating immediate removal of the eye.
Spontaneous hemorrhage beneath the choroid in an eye with normal tension is an extremely rare condition. The one and only case in my experience during the past twenty years occurred about a year and a half ago:
REPORT OF CASE
A woman, aged 44, married and apparently in good health, except for a moderately high blood pressure, had complained of blurred vision in her left eye for several days previous to the onset of inflammatory symptoms. She went to her regular oculist who saw no definite
CRIGLER LW. SUBCHOROIDAL HEMORRHAGE DIAGNOSED AS SARCOMA OF THE CHOROIDREPORT OF A CASE. Arch Ophthalmol. 1932;8(5):690–694. doi:10.1001/archopht.1932.00820180062006