For any object in an Org Model, open the tree and select a field. Select the "ACCESS" tab on the right panel. Then click "Fetch field access data" to get the data.

You will get a notification when access details have been updated. You will see what profiles and permission sets (and how many) are associated with a given field.

The hyperlink icons will open the profile pages inside Salesforce Setup. If you roll over a listed profile or permission set you will see a popover with key metadata about it:

Click on "Show users with access" text to see how many users have access to this field together with their access type. 

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