Diseases and refraction of the eye / by N.C. Macnamara and Gustavus Hartridge.
- Nottidge Charles Macnamara
- Date:
- 1891
Licence: Public Domain Mark
Credit: Diseases and refraction of the eye / by N.C. Macnamara and Gustavus Hartridge. Source: Wellcome Collection.
589/646 page 571
![is seen more distinctly than without, with + 2 D. § is still read, with + 25 D. vision is not so good; the same result is obtained with the left eye. + 2 D. for each eye, is the strongest convex glass with which £ can be read, and is therefore the measure of her Hm. We record it thus— E.V. f Hm. 2D. = |. L.V. f Hm. 2D.=|. On placing the patient in the dark room, and directing her to look at some distant object or at a black wall, so as to relax as much as possible the accommodation; with retinoscopy the shadow we perceive moves slowly against the mirror, we put +2 D. in a spectacle frame, in front ol the eye. The shadow is more distinct, and moves more quicklv We try stronger glasses and then find that + 35 D. is the highest with which we still get a reverse shadow. Both eyes are alike Next examine with the ophthalmoscope. By the indirect method the disc becomes smaller on withdrawing the objective from the eve With the] mirror alone at a distance, we see an image of the disc which moves with the observer s head, proving the image to be an erect one. On ap- pioachmg the eye the disc is not seen well, unless we put in force our own accommodation; with our accommodation suspended, we turn the wheel 1ht}almoscope so as to bring forward convex glasses, the clear- wht£ i f? ,US 18 TPTed 5 + 3 D- is the strongest convex glass with which the details can be distinctly and clearly seen by mYself V\ e might be satisfied with this result, assuming 35 D. to be the tactory to be able to record once and for all the total hyperinetrooia beyond doubt Atropine (grs. iv to *j) was therefore ordered one^r two drops to be placed in both eyes three times a day for four davs warning her that she will be unable to see well, and that the minilS XftLtS&e^hr6 al—a shade to lltlt On her return she reads only ^ with each eye, and she now requires + 5 D. to enable her to read f We also find with retinoscopy Xt Om patient, therefore, has a total hypermetropia of 5 D., two dioptres hltSaXs6 7^ if th^™\ VorZ± andrea'dlrTg wZd . akl off TdTS^ Wh6n atr°pine haS been Used> ifc is pessary to Case 11 M™Ztlle,measui'eme^ thus found, as before explained.7 lias a W u J°Un3 man' ffit- 20> next presents himself. He £e8 ItU ? nSdS ctl Mm toTo?^ 7 J ^ ^M as possible, the weSaVaerir7 W^tSt ttti^ ^ % ^ t0 VT** W a* with oiri, pvp n , acuteiies8 of vision, and find then he reads -ds No.?, at onL E^'fr^^^fr^J*](https://iiif.wellcomecollection.org/image/b20405698_0593.jp2/full/800%2C/0/default.jpg)
