To solve the problem of car headlight astigmatism to focus the light, you first need to use a screwdriver to adjust the screw rod behind the light holder to change the beam direction of the headlight until it reaches the ideal focusing position. Next, we need to understand the specific reasons why car headlights scatter and do not focus light so that more precise adjustments can be made.

　　A common cause of headlight astigmatism is improper placement of the bulb. When the car headlight bulb is not installed correctly in the middle of the lampshade, astigmatism occurs. To solve this problem, we need to readjust the height of the headlights. Before adjusting, check whether the headlight base is loose to ensure the accuracy and stability of the adjustment.

　　Another possible cause of car headlight astigmatism is that the luminous point of the LED light is inconsistent with the luminous point of the original car. When the luminous point of the LED light does not match the refraction direction of the original car reflector, there will be no light concentration. In order to solve this problem, we need to fine-tune the LED bulb so that its luminous point accurately corresponds to the refraction direction of the original car reflector, so as to achieve the ideal light concentration effect.

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