Your glasses may be ageing you more than any line on your face — and it has nothing to do with how old you are.

For the last two videos we talked about colour: the eight shades that flatter a woman after 60, then the eight pairings that read as expensive. Today all of that lands on the one thing that sits permanently against your skin, closer to your eyes than any garment will ever get.

After forty years of watching women look at themselves in my fitting-room mirror, I can tell you a frame only ever does one of two things. It lifts the eye, or it drags it down. There is no neutral.

The 5 frames that lift:

• The gentle lifted cat eye — a small architectural lift, not a 1950s wing
• The soft rectangle with rounded corners — structure without severity
• The light wire rim — for anyone whose glasses have always overpowered her face
• Transparent and crystal frames — all the shape, none of the harsh contrast
• The upswept butterfly — height and lift without the heaviness of oversized lenses

Then the part almost nobody is ever told: the small design details that decide everything. Where the temple arm attaches to the frame, and why a high hinge lifts your whole face while a low one quietly pulls it down. Where the top rim should sit against your brow. How wide the frame should actually be. I have never once heard a woman told any of this in a shop.

And finally frame colour — the warm tones that light up mature skin, and the four to be careful with. Including one I need to reconcile with something I told you in the colour video, because the answer is more interesting than it looks.

None of this outranks seeing properly or being comfortable. A frame that slides down your nose all day will never look elegant, however flattering the shape.

Tell me in the comments which frame you are trying first — I read every single one.

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