5 clinical parameters to check before booking a cosmetic procedure

An aesthetic consultation costs $150 to $500 and runs 20 to 40 minutes. Half of that time goes to introductions, history, and photographs. The actual clinical conversation is short. Most patients leave with a plan that is the surgeon's interpretation of one or two things the patient said, often the wrong one or two things.

You can change that ratio by walking in with five numbers already measured. Here are the five that come up most.

1. Canthal tilt

Relevant if: you are considering any upper-third procedure (brow lift, canthoplasty, upper blepharoplasty, undereye filler).

What to know: your tilt in degrees, sign (positive vs negative), the gender-typical band for your ethnicity, and how far inside or outside that band you sit. If you are 3 degrees below the gender-typical floor, the conversation with the surgeon is about whether procedures can restore the angle and by how much.

2. Midface ratio

Relevant if: you are considering cheek filler, midface lift, or any volumising treatment.

What to know: the ratio of midface height to total face height, against gender and ethnicity baselines. Midface volume loss is the structural change underneath what often gets diagnosed as "tired skin." Knowing whether your midface ratio is below baseline tells you whether filler will actually solve the problem you are seeing.

3. Skin homogeneity score

Relevant if: you are considering laser resurfacing, chemical peels, or aggressive topical retinoid protocols.

What to know: a Fink chromophore variance score for your skin. If your homogeneity is already strong (low variance), a laser is probably the wrong intervention. If variance is high and concentrated in pigmentation rather than redness, a different laser type is indicated than if variance is concentrated in erythema. The same procedure can be right for one face and wrong for another with apparently similar skin.

4. Brow peak position

Relevant if: you are considering a brow lift, brow tattoo / microblading, or aesthetic ophthalmology.

What to know: the location of your brow peak relative to the lateral limbus of the iris, in millimeters. Carruthers 2020 defines the aesthetic ideal as the peak sitting slightly lateral to the lateral limbus. If your peak is medial, a lift will not move it (you need a different procedure). If it is lateral but low, a lift may help. Walking in with the number means the surgeon can give you a target, not a generic "we will see what we can do."

5. Nasal width ratio

Relevant if: you are considering rhinoplasty, alar base reduction, or non-surgical nose contouring.

What to know: alar width divided by face width, against ethnicity baselines. "My nose is wide" is too vague to plan from. "My alar-to-face-width is 0.32 against a Caucasian baseline mean of 0.27" gives the surgeon a target. The difference also tells you whether non-surgical contouring is realistic or whether the only meaningful change is structural.

What this is not

Walking in with parameters is not substituting for a surgeon. A clinician's in-person assessment, palpation, and surgical judgement are not replaceable by a photograph-derived ratio. The numbers anchor the conversation. The surgeon still decides what is appropriate for your face.