You may have heard of the term ‘grind lenses’ but probably don’t really know what it really means. The same may apply to the term ‘stock lenses’. Anyway, stock lenses are finished on both the front and back surface, come in various powers including correction for astigmatism and are delivered as a round blank of perhaps 65 or 70mm in diameter. The lens is then shaped by a machine so that it can be fitted into a frame. The picture below is of two pairs of glasses with the one above made in stock lenses and the one below in grind. Look at the thickness difference!
Grind lenses begin as a ‘semi finished’ blank, whereby the front surface only is finished and the back surface is finished by a machine called a generator. Because grind lenses are specially surfaced, they can be made to the correct thickness for the dimensions of the frame and a thinner, more comfortable pair of glasses can result. Pictured below is a semi-finished lens blank as is straight out of the packet.
Here is our stock lens cupboard. Shown are a range of plus powers only in various corrections for astigmatism.
Below is a stock lens before being cut.
Sometimes however, whether the lens is grind or stock makes no difference. It all depends on the prescription, frame size, distance between the pupils, amount and angle of astigmatism. Only a well trained and experienced optical mechanic or dispenser can interpret all that information and really know which way to go. Doing the wrong thing can result in ugly, heavy glasses or unecessary expense.
Robyn is a long time customer of ours who travels all the way from the opposite side of Melbourne which is two hours away just to purchase her glasses from us. This time we made her lenses to our own design which have 16 Sworovski diamantes emplanted into each lens. The rimless mount is a ‘Stepper’ titanium which are very fine and give a very subtle, minimalist look. We used Japanese Hoya progressive (multifocal) lenses which offer fantastic scratch resistance with their advanced coating technology.
Sometimes we do interesting things to help our clients. A gentleman came to us today asking if there was some way we could help his poorly fitting glasses that he had purchased elsewhere. They were sitting way to low on his face due to his rather narrow nose. We retro fitted nose pads into his frame, now they sit perfectly and he can see again! The first step was to remove the original moulded plastic pads with a file, then smooth the area with fine sandpaper, then polish. We then drilled holes in the frame and pressed in the new titanium pad arms.
We can tint lenses using FL41 tint supplied by BPI in the U.S.A. Whilst most of the evidence is anecdotal, is does seem that people who are afflicted by light induced migraine can get relief from it by wearing FL41 tinted lenses to 50% density.
Please come in and see us about tinting your prescription lenses if you suspect or know that your migraine is caused by light, especially flickering fluorescent lighting.
If you do not wear or need prescription lenses then of course we can make them with no prescription for you, referred to in our industry as ‘plano’.
They are not available in Transitions (photochromatic) and cannot be combined with anti reflective coating.
FL41 tint by BPI
We’ve just received a new delivery of Francis Klein frames from Paris.
‘Fiesta’ by Francis Klein of Paris
We love to stock bold frames with colour and patterns. These models from Jono Hennessy (Jonathan Sceats) fit the bill exactly! Beautifully finished and made to last.
Jono Hennessy 8322 colour C200
Jono Hennessy 8322 colour C200
Technology in the eye care field is racing ahead at a lightning pace. We now have the ability to diagose many eyes conditions way ahead of conventional techniques, and one of the greatest advances in this area is Optical Coherence Tomography or O.C.T. O.C.T. is similar in some ways to the results we see when we do an ultrasound on some other part of the body, but rather than ultrasound, O.C.T. uses light. It creates an image of tissues of the retina so we can see down through the cell layers in three dimensions. The best analogy is that of a cake. If we view a cake from the top only we have no idea of the layers underneath that constitute how the cake layers are made and it’s the same with conventional diagnostic techniques. When an eyecare professional looks at the back of your eye they only see the top layer of the cake, they can’t see what is happening below the surface. O.C.T. however changes all that. It gives us a very accurate snapshot in minute detail of the health of the macular area of the retina including the optic nerve head.
This is a scan of a healthy macula. The dark stripes are the shadows of blood vessels.
The scan below is of a patient of ours who has diabetes. It looks quite different to the one above. The diabetic macula oedema can clearly be seen as swelling and sacks of fluid.
Thiis is an OCT scan of diabetic macular oedema
Fortunately there is now treatment available if the oedema is diagnosed early enough. Diabetics in particular should be having regular eye examinations as they are particularly susceptable to complications.
Francis Klein “Arty” is a smaller frame in the collection, being a 48 eye size, it is for the more “petite” lady. Check out our online store here.
Francis Klein “Arty”
Francis Klein “Arty” side view
This is a fantastic frame from Francis Klein of Paris. It is a larger size, being a 54 /19. It is black and crystal with some fabulous decorations on the front. Please click here to enter our online store! Click on the image to enlarge it. Then you can see the detail!
Francis Klein “Wing”
Francis Klein “WIng” side view