There are many factors effect the lenses thickness.
(1). Prescription. the sph and cyl are higher, then the lenses will be thicker.
(2). Lenses Index. Index is lower, the lenses is thicker.
(3). Frame Size. Frame is bigger, the lenses is thicker.
(4). PD (pupil distance). if the PD is different as Glasses Frame distance, then lenses will be moved , the more difference, the thicker of lenses.
3. Quality Assurance
We will test every lenses before shipment, so normally no mistake.
if you feel it's wrong prescription, then please test the lenses in your opitcal shop, and send us test picture. or you return the glasses by post and we will test it again and send you test picture.
we will make new lenses for you, or refund you lenses cost if confirmed it's our mistake (return shipping cost will also be refund).
4.About delivery time and packaging
Each pair of multifocal lenses needs customized within 7-10 days.
The glasses are loaded into the anti-pressure glasses case and then loaded into the bubble bag to ensure the safe arrival of the glasses.