diff --git a/nalgebra-glm/src/ext/matrix_clip_space.rs b/nalgebra-glm/src/ext/matrix_clip_space.rs
index bf8c6aeb..8739d018 100644
--- a/nalgebra-glm/src/ext/matrix_clip_space.rs
+++ b/nalgebra-glm/src/ext/matrix_clip_space.rs
@@ -870,7 +870,20 @@ pub fn perspective_fov_zo<N: Real>(fov: N, width: N, height: N, near: N, far: N)
 /// 0 to 1 depth clip space or a -1 to 1 depth clip space.
 ///
 pub fn perspective<N: Real>(aspect: N, fovy: N, near: N, far: N) -> TMat4<N> {
-    // TODO: Breaking change: the arguments can be reversed back to proper glm conventions
+    // TODO: Breaking change - the arguments can be reversed back to proper glm conventions
+    //
+    //       Prior to changes to support configuring the behaviour of this function it was simply
+    //       a wrapper around Perspective3::new(). The argument order for that function is different
+    //       than the glm convention, but reordering the arguments would've caused pointlessly
+    //       un-optimal code to be generated so they were rearranged so the function would just call
+    //       straight through.
+    //
+    //       Now this call to Perspective3::new() is no longer made so the functions can have their
+    //       arguments reordered to the glm convention. Unfortunately this is a breaking change so
+    //       can't be cleanly integrated into the existing library version without breaking other
+    //       people's code. Reordering to glm isn't a huge deal but if it is done it will have to be
+    //       in a major API breaking update.
+    //
     if cfg!(feature="zero_to_one_clip_default") {
         perspective_zo(aspect, fovy, near, far)
     } else if cfg!(feature="negone_to_one_clip_default") {
diff --git a/nalgebra-glm/tests/lib.rs b/nalgebra-glm/tests/lib.rs
index f071572a..0813a7bc 100644
--- a/nalgebra-glm/tests/lib.rs
+++ b/nalgebra-glm/tests/lib.rs
@@ -6,6 +6,7 @@ use na::Orthographic3;
 use glm::Mat4;
 use glm::Vec4;
 
+// Ensure that under default conditions the library doesn't break interface with old convention
 #[test]
 pub fn orthographic_glm_nalgebra_same()
 {
@@ -19,6 +20,7 @@ pub fn orthographic_glm_nalgebra_same()
     assert_eq!(na_mat, gl_mat);
 }
 
+// Ensure that under default conditions the library doesn't break interface with old convention
 #[test]
 pub fn perspective_glm_nalgebra_same()
 {
@@ -33,6 +35,7 @@ pub fn perspective_glm_nalgebra_same()
     assert_eq!(na_mat, gl_mat);
 }
 
+// Ensure that under default conditions the library doesn't break interface with old convention
 #[test]
 pub fn orthographic_glm_nalgebra_project_same()
 {
@@ -48,9 +51,11 @@ pub fn orthographic_glm_nalgebra_project_same()
     let na_pt = na_mat * point;
     let gl_pt = gl_mat * point;
 
+    assert_eq!(na_mat, gl_mat);
     assert_eq!(na_pt, gl_pt);
 }
 
+// Ensure that under default conditions the library doesn't break interface with old convention
 #[test]
 pub fn perspective_glm_nalgebra_project_same()
 {
@@ -67,5 +72,6 @@ pub fn perspective_glm_nalgebra_project_same()
     let na_pt = na_mat * point;
     let gl_pt = gl_mat * point;
 
+    assert_eq!(na_mat, gl_mat);
     assert_eq!(na_pt, gl_pt);
 }
\ No newline at end of file