BSI PD ISO/TS 6838:2024
$142.49
Ophthalmic optics — Contact lenses — Tolerances and methods for measurement of multifocal contact lens addition power
| Published By | Publication Date | Number of Pages |
| BSI | 2024 | 28 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 6 | Foreword |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions |
| 8 | 4 Tolerances 4.1 Tolerance limits 4.2 Conditioning of contact lenses prior to testing |
| 9 | 4.3 Tolerances for rigid and soft contact lenses 5 Methods of measurement for multifocal add power 5.1 General 5.2 Wavefront sensor 5.2.1 Wavefront instrument specification 5.2.2 Wavefront calibration |
| 10 | 5.2.3 Wavefront method of measurement 5.2.4 Power profile examples |
| 12 | 5.2.5 Bifocal contact lens |
| 13 | 5.3 Focimeter 5.3.1 Principle |
| 14 | 5.3.2 Focimeter specification |
| 15 | 5.3.3 Focimeter calibration 5.3.4 Measurement of most plus and least plus power |
| 16 | 6 Ring test results 6.1 Ring test objectives 6.2 Ring test background |
| 17 | 6.3 Ring test executive summary 6.3.1 WFS calibration verification using (13) certified low-power glass lenses |
| 18 | 6.3.2 Focimeter calibration verification using (10) standard B+L calibration lenses 6.3.3 WFS gauge repeatability and reproducibility (GR&R) using PV2 MF HA lenses 6.3.4 Focimeter gauge repeatability and reproducibility (GR&R) using PV2 MF HA lenses 6.4 Calibration lens accuracy requirements |
| 19 | 6.4.1 Focimeters 6.4.2 Wavefront sensor low-power lenses |
| 21 | 7 Discussion 7.1 Ring test conclusions 7.2 Ring test recommendations 7.3 Multifocal add-power measurement challenges 7.3.1 Immersed wavefront sensor measurement challenges |
| 24 | 7.3.2 In-air wavefront sensor measurement challenges 7.4 Questions to answer before the TS moves to become a standard |
| 26 | Bibliography |
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