Pixel Perfect with Height constant

Hi,

So there is this following code that makes the camera height constant in game whatever resolution you choose:

 var nativeResolution = new Vector2(480, 320);
 var pixelsToUnits = 16f;
 
 Camera.main.orthographicSize = nativeResolution.y / 2f / pixelsToUnits;

But still it is not Pixel Perfect. So my question is that how I can make it Pixel Perfect with constant height?