ещё хуже то, что
• To make matters worse [or To complicate (or aggravate) matters (or the situation)], the edges of both lens elements must be ground.
Русско-английский научно-технический словарь• To make matters worse [or To complicate (or aggravate) matters (or the situation)], the edges of both lens elements must be ground.
Русско-английский научно-технический словарь