244 Home Treatment
Children and adults who have worn glasses will have to devote an hour or longer every day to practice with the test card and the balance of their time to practice on other objects. It will be well for such patients to have two test cards, one to be used at the near-point, where it can be seen best, and the other at ten or twenty feet. The patient will find it a great help to shift from the near card to the distant one, as the unconscious memory of the letters seen at the near-point helps to bring out those seen at the distance.
If you cannot obtain a test card, you can make one for yourself by painting black letters of appropriate size on a white card, or on a piece of white paper. The approxi mate diameter of these letters, reading from the top of
If the patient can secure the aid of some person with normal sight, it will be a great advantage. In fact, per sons whose cases are obstinate will find it very difficult, if not impossible, to cure themselves without the aid of a teacher. The teacher, if he is to benefit the patient, must himself be able to derive benefit from the various methods recommended. If his vision is 10/10, he must be able to improve it to 20/10, or more. If he can read fine print at twelve inches, he must become able to read it at six, or at three inches. He must also have sufficient control over his visual memory to relieve and prevent pain. A person who has defective sight, either for the distance or the near-point, and who cannot remember black well enough to relieve and prevent pain, will be unable to be of any material assistance in obstinate cases ; and no one will be able to be of any assistance in the application of any method which he himself has not used successfully.