Mean and range testing times for Brightness Sense, Colour vision, and Visual Acuity were 32.7 s (range = 12–63 s), 52.8 min (range = 17–95 s), and 88.75 s (range = 41–188 s), respectively. Testing times were brief and exit pleasure responses were positive. iPad and printed plates Colour vision testing produced identical results. The mean difference between iPad and E-Chart visual acuities with pinhole was 0.02 logMAR with limits of agreement from −0.08 to +0.11 logMAR. Using 20/30 as cutoff for normal acuity, 1 of the amblyopes was detected, and non-amblyopes were excluded by visual acuity pinhole testing. Resultsīinocular brightness balance on the iPad detected amblyopes with 100% sensitivity and specificity. Unilateral amblyopia was later confirmed in two subjects. Acuities and colour vision were tested with tumbling Es and AO-HRR colour plates, respectively.
The differential brightness of image pairs was varied through a staircase algorithm until equal brightness was perceived. Subjects looked through polarizing filters and chose the brighter of two spaceships to measure interocular brightness disparity. Two hundred eight subjects (3–14 years) were recruited for a prospective, observational protocol to measure interocular brightness disparity, uniocular acuities with and without a pinhole, and colour vision using an iPad. Certified individuals are then equipped to train individuals at their own organization.Can measuring interocular brightness disparity, acuity, and colour vision classify children with amblyopia? Subjects/Methods Re-certification training is conducted at the Licensed Certification Centers.
The term for a J-STD-001 Certified IPC Trainer is two years. Candidates must successfully complete the soldering workmanship portions of the training session and the certification exam. These training courses include soldering labs, classroom instruction and demonstrations. This certification is appropriate for individuals such as assembly process engineers, quality assurance supervisors, training managers and others responsible for the quality and reliability of soldered electronic assemblies.Ĭertification for an individual is carried out by attending a training course conducted by any of the IPC authorized training centers listed on the IPC site. The standard emphasizes process control and sets industry-consensus requirements for a broad range of electronic products. The standard lists requirements for the manufacture of electrical and electronic assemblies and includes materials, methods and verification criteria. IPC J-STD-001 is an individual level certification based on a standard published by IPC titled "Requirements for Soldered Electrical and Electronic Assemblies".
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