Thanks for posting your enquiry, According to the patient s history, at this time your patient is an elective candidate for ophthalmic surgery and suffering from an unstable and uncontrolled high blood pressure. In general, blood pressure levels (hypertension) are classified as: 1. Prehypertension: systolic 120 –139 and diastolic 80–89. 2. Stage one: systolic 140–159 and diastolic 90–99. 3. Stage two: systolic 160–179 and diastolic 100–109. 4. Seriously hypertensive systolic ≥ 180 and diastolic ≥ 110. To treat hypertension, step by step the patient receives appropriate medications from a doctor. Each step takes some days to establish, otherwise, it leads to an unstable blood pressure. It demands your father to be tolerant. As it can be seen that your patient may demand a combination medication therapy to control his hypertension. This method is based on bilateral co-operation between doctor and patient using anti-hypertensive drugs such as alpha, beta, angiotensin and calcium channel blockers, diuretics, vasodilators and so on. Please notice that your father suffers from intraocular hypertension demanding specific consideration before and after elective surgery since it may increase blood pressure enormously and interfere with operation process while your father is under surgery. Hope your father feels fine very soon, Regards