The answer is obviously yes, it's really bad for eyes to read with sad lamps. When you read with sad lamps for a long period of time, you tend to blink less, which will strain your eye muscle and make it ache and even result in dryness of the eyes. In addition, if you read with sad lamps, in order to focus on the object in poor lights, you have to be closer and closer, which might get sore eyeballs, headaches, back and neck aches as well as blurred vision. Therefore, in consideration of your eyes, you'd better read in a good lighting condition. Besides, massaging your eyes when your eyes feel tired is also a great way to protect your vision effectively.