Breakdown of Внутриглазное давление и поле зрения измерили.
Questions & Answers about Внутриглазное давление и поле зрения измерили.
Because together they form a coordinated pair: внутриглазное давление и поле зрения = intraocular pressure and visual field. Russian uses a plural verb with two items joined by и.
So even though each noun is singular by itself, the whole phrase is grammatically plural in meaning.
Also, in this sentence there is another layer: измерили can imply an omitted they. So the plural can also be understood as they measured.
There is no explicit subject here. Russian very often leaves out an indefinite plural subject when English would say they or use the passive.
So:
- Внутриглазное давление и поле зрения измерили. can mean literally They measured the intraocular pressure and the visual field.
But in English, especially in medical style, this is often translated more naturally as:
- The intraocular pressure and visual field were measured.
This is a very common Russian pattern.