The table above describes the trade-off between the different options of IOT Office lenses , and compares this to a generic PAL . The depiction is accurate in practice : These lenses are far superior to general PAL ’ s in the near range .
Which lens to select depends on application , tasking , and the patients age and experience with PALs . As a rule , lean towards the lens with the greatest distant range for younger patients , early presbyopes , patients new to PALs , and TBI cases ; so , consider the 4.0 before the 1.3 . I personally have grown so fond of these lenses , I use the 1.3 for most of my writing and reading , and a 4.0 for general wear around the office . The 4.0 offers distant vision to 4m , and so this is ideal in the exam room where the bulk of the work is within arm ’ s reach , but you still need to see the patient clearly and occasionally move around the space . I would hesitate wearing the 1.3 or 2.0 for moving about even in an examination lane and prefer to remove this when I move from a stationary position . This is the same advice I would offer my neurotypical patients . I advise greater caution when dealing with TBI patients : As a rule , remove the multifocal and switch to a single vision distance Rx for ambulation in these cases .
For the price , these lenses offer superior quality optics for the near range with quick adaptation , minimal distortion , and excellent comfort . In therapeutic cases , we want to minimize ‘ swim ’ and other distortions associated with head movement , and these lenses show minimal distortion of this kind . The range of options is simple to understand , and with appropriate patient education , clinicians and opticians should expect many happy faces .
Dr . Boulet began his professional career in education in 1990 , a science teacher and early integrator of technology in the classroom . His practice is in Black Diamond , Alberta . His background includes degrees in neural science and education from the University of Alberta , and a doctorate in optometry with a behavioural focus from Pacific University . His paper on visual impediments to learning and development remains a common reference for therapists from varied domains ( http :// oepf . org / visual-impediments-tolearning /). An active advocate for higher child vision standards , he continues to consult and teach on child learning and behaviour concerns around the Province and online .
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