Brief Answer:
Not an unexpected finding- More importantly, the headache SHOULD be treated

Detailed Answer:
Blood pressure is a variable set of numbers which literally alter second by second (even if in the absence of pain). However, visual symptoms associated with ocular migraines such as visual aura, anxiety, stress, and even minor discomfort from lack of visual clarity can cause the release of adrenal hormones (epinephrine, cortisol) resulting in palpitations, increased muscle tension throughout the body and of course, blood pressure elevations.

Therefore, elevated BP in the face of the PAINLESS visual aura of ocular migraines is not an unexpected finding....or perhaps, as you 've termed it, "normal" until such time as the aura and/or headache symptoms begin to subside.

A word of caution....the term OCULAR MIGRAINE is often confused by both patients and DOCTORS alike so please understand what the term means in the vernacular of those who have definted its existence and do not CONFUSE IT WITH something else that may be thought to be similar called RETINAL MIGRAINE. The biggest difference between an ocular migraine and retinal migraine is that the latter is often accompanied by a LOSS OF VISION....(true loss of vision...not just obstructed view by phosphenes, etc) in 1 eye and is usually UNRELATED to the process of headache and should be investigated for something of a more serious nature which can usually be found to be an ORGANIC basis resulting in the visual loss or blockage of blood flow to the retina.

With Ocular migraines this is not the case and the visual aura is not concerned to be of clinical significance...except to the extent that all types of MIGRAINE headaches are considered to be risk factors for STROKE and for this reason I am very careful with my patients to explain this risk which justifies being AGGRESSIVE when TREATING THE AURA despite the absence of pain, nausea, vomiting, or other debilitating symptoms.

Take a look at this short article which does explain the differences between RETINAL AND OCULAR MIGRAINES and use this as a source of talking points with your doctor to be sure your treatment strategy has taken into consideration the basic differences between these headaches which should BOTH be treated aggressively and not simply allowed to "run its course" just because there's no pain, it doesn't last that long, or there are not really any other symptoms of import......this is the wrong way to approach these headaches.

https://www.mayoclinic.org/diseases-conditions/migraine-headache/expert-answers/ocular-migraine/faq-0000

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