An image processing pipeline then determines whether the coin landed heads or tails. Once the coin has landed, it is photographed with a webcam. A spring-loaded dowel is actuated by a stepper motor spinning a cam, which flips the coin. A large cylindrical shroud is used to keep the coin within the flipping area. The build consists largely of 3D printed parts. Of course, if you want to test this, it pays to have a machine do the hard work for you. Often, there is talk of how, given a fair coin, the probability of landing heads or tails should approach 0.5. Please call us and one of our team members will talk you through the process.Flipping a coin is often the initial example used to help teach probability and statistics to maths students. If your package arrives damaged, or does not arrive at all, we are happy to replace your items. My goods arrived damaged, or my goods were not delivered. If you have not received your order after this time, please contact our practice by phone or email. Please allow up to 7 working days for delivery. FAQ’s Shipping & Returns My order has not arrived, what should I do? (please see exchange policy for further information). If you receive your item, and decide you would like to change your order, you are welcome to make an exchange. Successful cancellations will be refunded within 7-10 working days. If your item has already been dispatched we will be unable to make any amendments to the item. Any cancellations made during working hours, before your item has been dispatched, will be accepted. If you wish to cancel your order, please contact us to do so. If you would like to make an exchange, please call our office. When an exchange is requested for a product of different value, the price difference will be calculated excluding the delivery charge of the original purchase. Items sent for exchange must be unopened and in original condition.Įxchanges can be performed for the same product with a different prescription, or for a different product of the same value. We promise to provide an exchange service on items up to 30 days after the order purchase date. Once accepted, refunds will take up to 7-10 working days to show up in your account. Items are required to be unopened and in original condition. We are happy to accept returns within 30 days of purchase for a full refund. However, if we have made a mistake with your order, then we will be happy to offer a refund of all costs, which also includes money spent on postage and packaging. Items are only eligible for a refund if they have not been opened or used, and if they are in original condition. We understand that on occasion, purchased items need to be returned.Ī full refund is offered (excluding delivery charges) with any product that you wish to return. We are always here to help our customers. Up to 4 weeks for multifocal toric and XR lenses.Īll orders under $150 will have a delivery charge of $8.99, whilst all orders above this will be FREE.ĭeliveries are fulfilled via USPS. The delivery of items which are in stock take approximately 3-5 working days, whilst items that are not in stock take 5-10 for standard lenses.
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