| 1. | A detached retina is more serious .
视网膜剥离就更严重了。 |
| 2. | Rays light impinge upon the retina .
光线射到网膜上。 |
| 3. | The periphery of the retina is very sensitive to motion .
视网膜的外围对运动非常敏感。 |
| 4. | This property is used in the treatment of a detached retina .
这种特性可用来治疗视网膜脱离。 |
| 5. | The choroid coat carries many blood vessels to supply the retina .
脉络膜通过许多血管为视网膜供应血液。 |
| 6. | They predominate and are of greatest concentration in the central part of the retina .
它们在网膜中部占优势，具有最大的浓度。 |
| 7. | Thus stimulation of one retina will normally invoke pupillary constriction in both eyes .
刺激一侧视网膜可引起双眼的瞳孔收缩。 |
| 8. | To see an object distinctly, a sharp image of it must be formed on the retina .
为了清楚地看见一个物体，必须在视网膜上形成一个清晰的象。 |
| 9. | The most distant object for which an image can be formed on the retina is then nearer than infinity .
这时，能成象在视网膜上的最远物体比无穷远近。 |
| 10. | The receptive mechanism of the retina can also adapt itself to large differences in quantity of light .
视网膜的感受机构还可以自行调节以适应光量上的很大差别。 |
