<entry id="2228869" stat="A" corpus="jmdict" type="jmdict">
<ent_corp type="jmdict">jmdict</ent_corp>
<ent_seq>1722060</ent_seq>
<k_ele>
<keb>節穴</keb>
</k_ele>
<k_ele>
<keb>ふし穴</keb>
<ke_inf>&sK;</ke_inf>
</k_ele>
<r_ele>
<reb>ふしあな</reb>
</r_ele>
<sense>
<pos>&n;</pos>
<gloss>knothole</gloss>
<gloss>peep-hole</gloss>
</sense>
<sense>
<pos>&n;</pos>
<gloss g_type="fig">bad eyes</gloss>
<gloss>tunnel vision</gloss>
</sense>
<info>
<audit time="2010-07-23 18:33:03" stat="A" unap="true">
<upd_uid>paul</upd_uid>
<upd_name>Paul Blay</upd_name>
<upd_email>...address hidden...</upd_email>
<upd_detl>Google estimate of 17,600 hits for "ふし穴"</upd_detl>
<upd_diff>@@ -6,0 +6,3 @@
+&lt;/k_ele&gt;
+&lt;k_ele&gt;
+&lt;keb&gt;ふし穴&lt;/keb&gt;
@@ -13,0 +16,1 @@
+&lt;gloss&gt;peep-hole&lt;/gloss&gt;</upd_diff>
</audit>
<audit time="2010-07-23 22:14:17" stat="A">
<upd_uid>jwb</upd_uid>
<upd_name>Jim Breen</upd_name>
<upd_email>...address hidden...</upd_email>
</audit>
<audit time="2023-04-17 16:00:47" stat="A" unap="true">
<upd_name>Stephen Kraus</upd_name>
<upd_email>...address hidden...</upd_email>
<upd_refs>meikyo: 見ることのできない目。物事の本質を見抜く力のないことをあざけっていう語。

I suspect the second sense is mostly used figuratively

Google N-gram Corpus Counts
╭─ーーーー─┬────────┬───────╮
│ 節穴　　 │ 44,399 │ 74.9% │
│ ふし穴　 │  1,409 │  2.4% │ - sK
│ ふしあな │ 13,434 │ 22.7% │
╰─ーーーー─┴────────┴───────╯</upd_refs>
<upd_diff>@@ -8,0 +9 @@
+&lt;ke_inf&gt;&amp;sK;&lt;/ke_inf&gt;
@@ -20,0 +22 @@
+&lt;gloss&gt;tunnel vision&lt;/gloss&gt;</upd_diff>
</audit>
<audit time="2023-04-17 20:57:49" stat="A">
<upd_uid>jwb</upd_uid>
<upd_name>Jim Breen</upd_name>
<upd_email>...address hidden...</upd_email>
<upd_detl>I think so.</upd_detl>
<upd_refs>JE examples.</upd_refs>
<upd_diff>@@ -21 +21 @@
-&lt;gloss&gt;bad eyes&lt;/gloss&gt;
+&lt;gloss g_type="fig"&gt;bad eyes&lt;/gloss&gt;</upd_diff>
</audit>
</info>
</entry>