Detecting if a player sees a part or not

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Hello fellow developers! I recently encountered a problem with my script, i have a module script that detects if the player is looking at a part or not, the problem i have here is that the script prints out that it dosent see the part when in first person. As the game is first person only i find this a big issue.

I searched everywhere and found no answer.

Module Script:

local module = {}


function module.ItemInView(plr, camera, checksubject, type_) 
	local partToCheck = checksubject
	if game.Workspace:FindFirstChild(plr.Name) then
		local char=game.Workspace:FindFirstChild(plr.Name)
         if char:FindFirstChild("HumanoidRootPart") and char:FindFirstChild("Humanoid") then
		-- Check if on screen:
		local rootPart = char:FindFirstChild("HumanoidRootPart")
		local humanid = char:FindFirstChild("Humanoid")

		local vector, inViewport = camera:WorldToViewportPoint(partToCheck.Position)
		local onScreen = inViewport and vector.Z > 0

		-- Raycast outward:
		local ray = camera:ViewportPointToRay(vector.X, vector.Y, 0)
		local raycastParams = RaycastParams.new()
		raycastParams.FilterType = Enum.RaycastFilterType.Exclude
		raycastParams.FilterDescendantsInstances = {partToCheck, char}


		--Big Difference


		--stretch is the distance between the player & the part to check
		local stretch = (partToCheck.Position - rootPart.Position).Magnitude

		local raycastResult = workspace:Raycast(ray.Origin, ray.Direction * stretch, raycastParams)

		-- Final check:
		local isVisible
		if type_ == "Screen" then
			isVisible = onScreen
		elseif type_ == "PlainSight" then
			isVisible = onScreen and not raycastResult
		end


		--Big Difference



		if isVisible then
			-- Do something
			local mag_distance = (partToCheck.Position - rootPart.Position).Magnitude
			print("In Vision is true")
			return {"true", mag_distance}
		else
			local mag_distance = (partToCheck.Position - rootPart.Position).Magnitude
			print("In Vision is false")
			return {"false", mag_distance}
		end
		--end the operation here
	else
		
		return {"false"}
		
	end
	
else
	return {"false"}
end
end	
	
return module

Also the local script:


local module = require(game.ReplicatedStorage.Visible)

while wait(.1) do
	local inview = module.ItemInView(game.Players.LocalPlayer, workspace.CurrentCamera, workspace.Assets.Open.Viewbox, "PlainSight")

	if inview[1] == "true" then
		print("Can see")
	elseif inview[1] == "false" then
		print("Can't see")
	end
end

Thanks for anyone who can help me solve this!