Glasses sizing (lens diameter etc) - how does it work

thelawnet

I have a pair of Oakley C-Wire with clear lenses which are 61-16-127 and also had a pair of Oakley Straight Jacket with brown polarised sunglass lenses 61-18-135.

I bent the C-Wires so they are a bit fallen apart.

The Straight Jackets fit very well but I've lost them and I don't want to pay £300 for a new pair.

I'm trying to find something similar online for 'less' money, but I'm struggling a bit. Are these dimensions all critical? Or can the (apparently very wide) lens dimensions vary by manfuacturer due to different styling?

GlasweJen

The first measurement is the eye size which is the length of the glass usually measured from the pupil centres.

The second measurement is the bridge size, the bit from one side of the nose to the other.

The third measurement is the length of the glasses leg.

The first two measurements are more important than the third.

All measurements in millimetres btw

[Deleted User]

Hi,


from a well known High Street Optician:

thelawnet

Sorry I should say info understand that the numbers refer to lens diameter, bridge width and arm length, the question is more in terms of finding a fit - how far can you diverge from those numbers on a new pair of glasses. Specifically the 61mm lens diameter which seems to be quite wide.

GlasweJen

As far as possible, for a good fit and optimal optics you want your eyes to be in the centre of the frame.

If you add the eye size and the bridge then deduct your PD the number should be as close to 0 as possible to get a good fit from a lenses point of view.

I have a PD of 69mm, my glasses are 54 - 16. On a woman with the average PD of 63 the glasses would look like something Deirdrie Barlow would go out in. If my PD was 73 the glassss would be a bit neat.

thelawnet

Hmm well my pupillary distance is 67

GlasweJen

thelawnet wrote: »

Hmm well my pupillary distance is 67

Your frames are probably a bit big then but some people like their sunglasses to be a bit bigger

[Deleted User]

Hi,


as long as the lens prescription is correct just get what ever suits your face,






or

getmore4less

Depending on frame type the bridge size can effect comfort.

For sunnies larger wrap frames give better protection

For prescription lenses the lens size can mean larger blanks are needed and depending where the centre is varying edge thickness.
Tends to be better if the frame design give protection with smaller lens.

Leg length how well they fit over the ears for straight ish legs longer less of a problem.

You have tried the fake Oakley sites?

thelawnet

I went to have a look in Vision Express at the frames.

The ones around 54 looked very silly - small. The larger 57/58 were fine.

The Oakley measurement seems to be because they wrap around and the lens is not flat, so the curved diameter is higher than the straight diameter.

BananaRepublic

Wider lenses are in part a fashion statement. I now have wider and taller lenses (52mm) and I find it gives a better wider field of view compared to smaller lenses that were very fashionable and maybe still are. The ideal size will depend on the style too.

Some online shops will send you sample frames to try on, you then return them and place the order.