diff --git a/api/app/application/lenses_repository.py b/api/app/application/lenses_repository.py
index f087fdd..f8f14ae 100644
--- a/api/app/application/lenses_repository.py
+++ b/api/app/application/lenses_repository.py
@@ -15,6 +15,11 @@ class LensesRepository:
         result = await self.db.execute(stmt)
         return result.scalars().all()
 
+    async def get_all_not_issued(self) -> Sequence[Lens]:
+        stmt = select(Lens).filter(Lens.issued == False)
+        result = await self.db.execute(stmt)
+        return result.scalars().all()
+
     async def get_by_id(self, lens_id: int) -> Optional[Lens]:
         stmt = select(Lens).filter(Lens.id == lens_id)
         result = await self.db.execute(stmt)
diff --git a/api/app/controllers/lenses_router.py b/api/app/controllers/lenses_router.py
index b83a081..7eaafa6 100644
--- a/api/app/controllers/lenses_router.py
+++ b/api/app/controllers/lenses_router.py
@@ -23,6 +23,20 @@ async def get_all_lenses(
     return await lenses_service.get_all_lenses()
 
 
+@router.get(
+    "/lenses/not_issued/",
+    response_model=list[LensEntity],
+    summary="Get all not issued lenses",
+    description="Returns a list of all not issued lenses",
+)
+async def get_all_not_issued_lenses(
+        db: AsyncSession = Depends(get_db),
+        user=Depends(get_current_user),
+):
+    lenses_service = LensesService(db)
+    return await lenses_service.get_all_not_issued_lenses()
+
+
 @router.post(
     "/lenses/",
     response_model=LensEntity,
diff --git a/api/app/infrastructure/lens_issues_service.py b/api/app/infrastructure/lens_issues_service.py
index e209377..ac1b9be 100644
--- a/api/app/infrastructure/lens_issues_service.py
+++ b/api/app/infrastructure/lens_issues_service.py
@@ -55,10 +55,20 @@ class LensIssuesService:
                 detail='The lens with this ID was not found',
             )
 
+        if lens.issued:
+            raise HTTPException(
+                status_code=status.HTTP_400_BAD_REQUEST,
+                detail='The lens is already issued',
+            )
+
         lens_issue_model = self.entity_to_model(lens_issue)
 
         await self.lens_issues_repository.create(lens_issue_model)
 
+        lens.issued = True
+
+        await self.lenses_repository.update(lens)
+
         return self.model_to_entity(lens_issue_model)
 
     @staticmethod
diff --git a/api/app/infrastructure/lenses_service.py b/api/app/infrastructure/lenses_service.py
index c499dca..3c18881 100644
--- a/api/app/infrastructure/lenses_service.py
+++ b/api/app/infrastructure/lenses_service.py
@@ -24,6 +24,14 @@ class LensesService:
             for lens in lenses
         ]
 
+    async def get_all_not_issued_lenses(self) -> list[LensEntity]:
+        lenses = await self.lenses_repository.get_all_not_issued()
+
+        return [
+            self.model_to_entity(lens)
+            for lens in lenses
+        ]
+
     async def create_lens(self, lens: LensEntity) -> LensEntity:
         lens_type = await self.lens_types_repository.get_by_id(lens.type_id)