Accommodative facility tests the patient´s ability to make sudden and accurate accommodative changes under binocular conditions by reading short and simple words under special conditions. This test helps to distinguish primary accommodative from primary binocular abnormalities. Measurement is only tested on nonpresbyopes and symptomatic patients whose phorias and visual acuity are normal. This test is appropriate for all youngsters who have difficulties with reading or near vision.
Equipment and set-up:
Firstly, mount +2.00/-2.00 pairs of lenses into a flipper device (two lenses on each side). The patient wears his distance correction. Ask him to hold the test in his nondominant hand. You hold the flipper device in your dominant hand. Have the room well illuminated.
The test measures how many words can a patient reads in one minute by flipping the flipper device in front of his eyes from plus lenses to minus lenses. By pressing the start, the test will begin measuring 60 seconds. You put flippers with plus lenses in front of his eyes and ask him to report a word written. As soon as he reads it, he is instructed to slide page to get another word, meanwhile you flip the flippers from plus to minus lenses. He is instructed to read the word again. Do this as long as 60 seconds when the test finishes. The test will give you the result how many words the patient has read in first and second 30 seconds. Be careful so the patient will not slide to the next word before you switch the sides of the flipper. In that case he will read two words with the same lenses in front in his eye; therefore the result will not be accurate. In addition, you have to observe the words of the tests as well, so you are sure he truly reads the words correctly.
Interpreting the results:
When the test gives you the results in the number of words read are written for the first and the second 30 seconds. The normal values for this test are around 25 words in first 30 seconds and about 15 words in last 30 seconds.