More visible focus lines for list item and checkbox

Hello,

my users complain that when focus is at list items or checkboxes they don't see it very well. Cursor is like "lost".

There is a dashed rectangle around list item and 2 paralel horizontal lines around checkbox. For checkbox I use only prompts, not labels.

My question is : is there any possibility to make these dashed lines wider or different color or checkbox bigger or some other way how to make focus more visible? In Forms 10g, or 11.2 in near future. I suppose that only somewhat in java, but I am not expert in java and using java in forms.