The Eyeline Back Vertex Distance (BVD) Gauge is an accurate low-cost device for measuring the distance between the back of a lens to the cornea in mm. The set comes with a pouch and calculator. The instructions for plus and minus powers are printed on the reverse side of the calculator. The gauge and calculator can be purchased separately i.e. one calculator and several gauges.
This measurement is very important when deciding on the lens power especially in swimming/ski goggles when the lenses are in the frame will more than 10/12 mm from the cornea, or when the lens powers are greater than ±6D
The advantage of this gauge is once the measurement is made, the distance set on the scale does not move when the measurement is completed. It also compensates for 1 mm to account for the eyelid thickness.
Easy to use. Simply read the measurements and sanitize.
The Eyeline Back Vertex Distance (BVD) Gauge is an accurate low-cost device for measuring the distance between the back of a lens to the cornea in mm. The set comes with a pouch and calculator. The instructions for plus and minus powers are printed on the reverse side of the calculator. The gauge and calculator can be purchased separately i.e. one calculator and several gauges.
This measurement is very important when deciding on the lens power especially in swimming/ski goggles when the lenses are in the frame will more than 10/12 mm from the cornea, or when the lens powers are greater than ±6D
The advantage of this gauge is once the measurement is made, the distance set on the scale does not move when the measurement is completed. It also compensates for 1 mm to account for the eyelid thickness.
Easy to use. Simply read the measurements and sanitize.
The Ishihara test is a colour perception test for red-green colour deficiencies, the first in a class of successful colour vision tests called pseudo-isochromatic plates (“PIP”). It was named after its designer, Shinobu Ishihara, a professor at the University of Tokyo, who first published his tests over 100 years ago. It has become the most widely used colour test method used worldwide today.
The Billings Optical Rule is a multi-task optical rule that has been jointly developed by John Billings FBDO, Eyeline Optical N.Z. Ltd and Aviva Mann Optical Group Australia. It allows for the accurate measurement of spectacle frames, PD’s, and other frame and fitting calculations required in today’s modern optical practice, laboratory and workshop environments.
Size: Handle: 35mm x 170mm
Mask part: 70mm x 140mm
O/A: 240mm x 140mm
Swap hands to reverse the hole position when screening.
Approved by DHB’s and VHT
Durable and easy to clean.
This Vocational test type book includes the standard near test type text sizes from N.48 down to N.4. The N.5 and N.4 lines are not part of the standard but are included as some professionals find it beneficial to have them. These tests should not be used to test a person’s reading ability or as an English test.
The tests represent a selection of vocational, occupational and recreational pursuits. The tests include text from a telephone book, illustrated engineering catalogue, a hand of playing cards, technical drawings, a street map, part of a choristers music score, a page from a dictionary, a sample of Pitman shorthand, an airline timetable, a shop docket and a computer generated price list.
There is also a specific test to meet the Certification Board qualifications for Inspection Personnel (CBIP) J.1 requirements. Also included is a test to meet the AS2177, Pt. 2, Clause 2.3.1 Standard of 0.50 mm sizing (see image 6).
Robust plastic glasses for uniocular vision testing. Comprises one pair with sunflower flip-up lenses to occlude each eye in turn. They measure 10.5cm across the inside of the frame.
Robust plastic glasses for uniocular vision testing. Set of two pairs, neon orange and green in colour. They measure 11.5cm across the inside of the frame.
0-3 Years – For optometrical refractions – Tabo System
The design of the frame and its hypoallergenic material have been manufactured to offer the best possible visual comfort during eye examination. The wrap-around temples give a good fit to the child’s face and the certified frame is safe in case a child chews it.
The bridge is centred and splayed, thereby helping to maintain the optical centres. Determination of the astigmatism axis is according to the TABO system.
Product details
PD Scale: 50mm
Weight: 16g
3 lens holders suitable for standard 38mm trial set lenses
