260 THE WONDERFUL HOUSE THAT JACK HAS 



Every doctor and almost every school now has an 

 eye-test card and every home can possess one. All 

 the lines on these cards should be read easily and ac- 

 curately with each eye, while the other is closed, at 

 the distances indicated in figures above them. The 

 horizontal, vertical, and oblique lines radiating from 

 the same centers in the cards should appear of equal 

 blackness. In all eye tests, it is important to try each 

 eye while the other is covered, for, if they do not see 

 alike, it is a sign that attention is needed. Perhaps the 

 teacher or principal can test our eyes with one of these 

 cards, but if not, some one who can should be 

 consulted. 



Should defects be discovered or suspected from such 

 an examination, or if, for any other reason, we suspect 

 their existence, we should go to an oculist without 

 delay. But perhaps we may live where there is no 

 oculist. For what better purpose can a visit to a city 

 be made than to have full power and comfort restored 

 to our eyes? Nor need the question of expense long 

 delay, for what person cannot earn the necessary funds 

 to secure the blessing of improved sight, if he sets out in 

 real earnest to accomplish that end ? Cities often have 

 infirmaries where persons who cannot afford to pay 

 may be cared for by well qualified physicians, but none 

 except the very poor should make use of this opportu- 

 nity.' Indeed, all should be anxious to pay for such a 

 precious possession as the full power of seeing, and there 

 are few oculists who will not allow a reasonable time for 

 payment. 



